Ebang International Holdings (EBON) Risk Analysis

We operate an international business and may have direct or indirect interactions with officials and employees of government agencies or state-owned or affiliated entities. We are subject to the FCPA, and other applicable anti-corruption and anti-money laundering laws in certain countries in which we conduct activities. The FCPA prohibits providing, offering, promising, or authorizing, directly or indirectly, anything of value to government officials, political parties, or political candidates for the purpose of obtaining or retaining business or securing any improper business advantage. In addition, U.S. public companies are required to maintain records that accurately and fairly represent their transactions and have an adequate system of internal accounting controls. In many foreign countries, including countries in which we may conduct business, it may be a local custom that businesses engage in practices that are prohibited by the FCPA, or other applicable laws and regulations. We face significant risks if we or any of our directors, officers, employees, contractors, agents or other partners or representatives fail to comply with these laws and governmental authorities in the United States and elsewhere could seek to impose substantial civil and/or criminal fines and penalties which could have a material adverse effect on our business, reputation, operating results, prospects and financial condition. Any violation of the FCPA, other applicable anti-corruption laws, or anti-money laundering laws could result in whistleblower complaints, adverse media coverage, investigations, loss of export privileges, severe criminal or civil sanctions and, in the case of the FCPA, suspension or debarment from U.S. government contracts, any of which could have a materially adverse effect on our reputation, business, operating results, prospects and financial condition. In addition, responding to any enforcement action or internal investigation related to alleged misconduct may result in a significant diversion of management's attention and resources and significant defense costs and other professional fees.

We may be directly or indirectly affected by changes in government regulations relating to the telecommunications and broadcast industries in the PRC or the U.S. Failure to comply with the relevant laws and regulations could subject us to severe penalties, which could have a significant impact on our cash flow. Moreover, the change of laws and regulations may render our current products illegal and require us to invest additional resources into the research and development of new products in compliance with the laws. As a result, our business and results of operations may be adversely affected. For example, in January 2021 the New York Stock Exchange LLC, or NYSE announced to delist three Chinese telecommunication companies based on guidance that the U.S. Department of Treasury's Office of Foreign Assets Control provided to the NYSE. We are uncertain whether such actions will have further impact on our business or the Chinese telecommunication industry in general. Our customers are also subject to laws and regulations applicable to the telecommunications and broadcast industries in the PRC. As they change their products to adapt to any change of telecommunications and broadcast laws, this may also require us to modify our products to fit their new products. Such modified or newly adopted laws and regulations could, directly or indirectly, affect the pricing, distribution and required standards of our telecommunications products and services and may have a material adverse impact on our business.

Iran is subject to a comprehensive sanctions program administered by the Office of Foreign Assets Control, or OFAC, and shipments of products subject to the Export Administration Regulations promulgated by the Bureau of Industry and Security, or BIS, in the Commerce Department are also subject to restrictions. In 2016 and 2017, we engaged in transactions that included the sale and/or delivery of our products to Iran under circumstances that may involve breaches of U.S. sanctions and export control laws. On August 2, 2018, we disclosed these transactions to both OFAC and BIS by our submission of Voluntary Self Disclosures, or VSDs. On January 25, 2019, BIS closed the VSD with a Warning Letter and no penalty. On March 4, 2019, OFAC closed the VSD with a Cautionary Letter and no penalty. OFAC requires us to not conduct business with persons named on its specially designated nationals ("SDN") list. However, because of the pseudonymous nature of blockchain transactions we may inadvertently and without our knowledge engage in transactions with persons named on OFAC's SDN list or from countries on OFAC's sanctioned countries' list. While we have implemented internal control measures to mitigate our risk exposure to international sanctions, sanctions laws and regulations are constantly evolving, new persons and entities are regularly added to the list of SDN list, and we may not be adequately capable of determining the ultimate identity of the individual with whom we transact with respect to selling cryptocurrency assets. Further, new requirements or restrictions could come into effect which might increase the scrutiny on our business or result in one or more of our business activities being deemed to have violated sanctions. To the extent government enforcement authorities enforce these and other laws and regulations that are impacted by decentralized distributed ledger technology, or if they were to determine that any of our future activities constitutes a violation of the sanctions they impose or provides a basis for a sanctions designation of us, we may be subject to investigation, administrative or court proceedings, and civil or criminal monetary fines and penalties, all of which could harm our reputation and affect the value of our ordinary shares.

In accordance with the laws and regulations in the jurisdictions in which we operate, we are required to maintain various approvals, licenses, permits and certifications in order to operate our business or engage in the business we plan to enter into. Complying with such laws and regulations may require substantial expenses, any non-compliance may expose us to liability. In the event of that government authorities consider us to be in non-compliance, we may have to incur significant expenses and divert substantial management time to rectify the incidents. If we fail to obtain all the necessary approvals, licenses, permits and certifications, we may be subject to fines, sanctions, revocation of licenses or permits to operate our business, or the suspension of operations of the facilities that do not have the requisite approvals, licenses, permits or certifications, which would adversely affect our reputation, business and results of operations. See "Regulation" for further details on the requisite approvals license permits and certifications.

On July 6, 2021, the relevant PRC government authorities issued the Opinions on Strictly Scrutinizing Illegal Securities Activities in Accordance with the Law. These opinions emphasized the need to strengthen the administration over illegal securities activities and the supervision on overseas listings by China-based companies, to improve relevant laws and regulations on data security, cross-border data transmission, and confidential information management, and provided that efforts will be made to revise the regulations on strengthening the confidentiality and file management relating to the offering and listing of securities overseas, and proposed to take effective measures, such as promoting the construction of relevant regulatory systems to deal with the risks and incidents faced by China-based overseas-listed companies. On February 17, 2023, the CSRC promulgated Trial Administrative Measures of the Overseas Securities Offering and Listing by Domestic Companies (the "Overseas Listing Trial Measures") and five related guidelines, which became effective on March 31, 2023. The Overseas Listing Trial Measures comprehensively improve and reform the existing regulatory regime for overseas offering and listing of PRC domestic companies' securities and will regulate both direct and indirect overseas offering and listing of PRC domestic companies' securities through a filing-based regulatory regime. Pursuant to the Overseas Listing Trial Measures, PRC domestic companies that seek to offer and list securities in overseas markets, either through direct or indirect means, are required to go through the filing procedure with the CSRC and report relevant information. The Overseas Listing Trial Measures provides that if the issuer meets both of the following criteria, the overseas securities offering and listing conducted by such issuer will be deemed as an indirect overseas listing by PRC domestic companies: (i) 50% or more of any of the issuer's operating revenue, total profit, total assets or net assets as documented in its audited consolidated financial statements for the most recent fiscal year is accounted for by domestic companies; and (ii) the main parts of the issuer's business activities are conducted in mainland China, or its main place(s) of business are located in mainland China, or the majority of senior management staff in charge of its business operations and management are PRC citizens or have their usual place(s) of residence located in mainland China. Besides, the determination as to indirect overseas listing by PRC domestic companies, shall be made on a substance over form basis. Subsequent securities offerings of an issuer in the same overseas market where it has previously offered and listed securities shall be filed with the CSRC within 3 working days after the offering is completed, and Subsequent securities offerings and listings of an issuer in other overseas markets than where it has offered and listed shall be filed with the CSRC within 3 working days after the relevant application is submitted overseas. If a domestic company fails to fulfill the filing procedure, the CSRC shall order rectification, issue warnings to such domestic company, and impose a fine; directly liable persons-in-charge and other directly liable persons shall be warned and each imposed a fine. According to Circular on the Arrangements for the Filing-based Administration of Overseas Securities Offering and Listing by Domestic Companies issued by the CSRC on February 17, 2023, from the implementation date of the Overseas Listing Trial Measures, domestic enterprises subject to the scope of filing that have offered shares or been listed overseas, or have met the following conditions shall be deemed as "existing enterprises", which are not required to go through the filing immediately but shall be required to do so if they involve in re-financing and other filing matters in the future. Based on the aforementioned criteria, we may be deemed as a PRC domestic company and our offshore offerings may be deemed as an indirect overseas listing by PRC domestic companies. Since we had already completed overseas offering prior to the effective date of the Overseas Listing Trial Measures, we should be deemed as an "existing enterprise" and not be required to go through the filing immediately. Only when we involve in re-financing and other filing matters will we be required to complete such filling with the CSRC. If so, we cannot assure you that we could meet such requirements or complete such filing in a timely manner. Any failure may restrict our ability to complete the proposed offshore offerings, which would have a material adverse effect on our business and financial positions. Further, as the Overseas Listing Trial Measures was recently promulgated, there remains substantial uncertainties as to its interpretation and implementation and how it may impact our ability to raise or utilize fund for business operation. On December 28, 2021, the CAC, the NDRC, the MIIT, and several other administrations jointly promulgated the Cybersecurity Review Measures ( the "Cybersecurity Measures"), which became effective on February 15, 2022. The Cybersecurity Measures has replaced its previous version promulgated on April 13, 2020. According to the Cybersecurity Measures, among others, (i) an application for cybersecurity review shall be made by an issuer who is a network platform operator holding personal information of more than one million users before such issuer applies to list securities on a foreign stock exchange; and (ii) the relevant PRC governmental authorities may initiate cybersecurity review if such governmental authorities determine that the issuer's network products or services, or data processing activities affect or may affect national security. On the bases that (i) the Cybersecurity Measures was promulgated recently, (ii) the exact scope of "network platform operator" under the Cybersecurity Measures remains unclear, and (iii) there are substantial uncertainties on the interpretation and application of the Cybersecurity Measures, there can be no assurance that we would be required to apply for such cybersecurity review for our offshore offerings. Any failure in completion of a cybersecurity review may result in administrative penalties, including fines, a shut-down of our business, revocation of requisite licenses, as well as reputational damage or legal proceedings or actions against us, which may have material adverse effects on our business, financial condition and results of operations. As of the date of this annual report, we have not been involved in any formal investigations on cybersecurity review made by the CAC on such basis. In addition, we cannot assure you that any new rules or regulations promulgated in the future will not impose additional requirements on us. If it is determined in the future that approval and filing from the CSRC or other regulatory authorities or other procedures, including the cybersecurity review under the enacted version of the revised Measures for Cybersecurity Review and the draft of Regulations on the Network Data Security, are required for our offshore offerings, it is uncertain whether we can or how long it will take us to obtain such approval or complete such filing procedures and any such approval or filing could be rescinded or rejected. Any failure to obtain or delay in obtaining such approval or completing such filing procedures for our offshore offerings, or a rescission of any such approval or filing if obtained by us, would subject us to sanctions by the CSRC or other PRC regulatory authorities for failure to seek CSRC approval or filing or other government authorization for our offshore offerings. These regulatory authorities may impose fines and penalties on our operations in China, limit our ability to pay dividends outside of China, limit our operating privileges in China, delay or restrict the repatriation of the proceeds from our offshore offerings into China or take other actions that could materially and adversely affect our business, financial condition, results of operations, and prospects, as well as the trading price of our listed securities. The CSRC or other PRC regulatory authorities also may take actions requiring us, or making it advisable for us, to halt our offshore offerings before settlement and delivery of the shares offered. Consequently, if investors engage in market trading or other activities in anticipation of and prior to settlement and delivery, they do so at the risk that settlement and delivery may not occur. In addition, if the CSRC or other regulatory authorities later promulgate new rules or explanations requiring that we obtain their approvals or accomplish the required filing or other regulatory procedures for our prior offshore offerings, we may be unable to obtain a waiver of such approval requirements, if and when procedures are established to obtain such a waiver. Any uncertainties or negative publicity regarding such approval requirement could materially and adversely affect our business, prospects, financial condition, reputation, and the trading price of our listed securities.

The money services business industry is relatively competitive in the jurisdictions we carry out or intend to carry out such businesses. Apart from the fierce competition we may face in this area, we may also face difficulty in penetrating the market. Regulators in various countries are imposing stricter licensing requirements towards new entrants. For instance, the Malaysian regulatory body is not only taking into consideration the aspect of compliance in granting the relevant licenses but also the value proposition of a business plan. The same is observed in Hong Kong and Australia, in which the relevant regulator requires a business plan as a prerequisite of granting a license. The Australian regulatory body imposes strict and ongoing obligations upon licensees of AFS licenses, including, among others, the requirement to report transfer instructions by users and the business' compliance with its obligations under anti-money laundering laws. Given the current approach by those countries that we conduct or intend to conduct business in, we might face uncertainty in connection with obtaining necessary licenses and approval before carrying out our money services business. The procedures and processes of obtaining such licenses and approval requires financial, human, and infrastructural resources. In the event that such licenses and approval are not granted by the relevant bodies, we might suffer from a loss even before the commencement of money services business in jurisdictions in which we intend to carry out such business. The risk disclosed herein is not abrogated upon the obtainment of requisite licenses and approval. As various countries seek to regulate the industry in a more comprehensive manner, more legal requirements may be put in place to maintain licenses and approval. The uncertainty of such future regulations also poses a substantial risk to us, which may adversely affect our business operations.

Some of our revenues and expenses are denominated in Renminbi. The Renminbi is currently convertible under the "current account," which includes dividends, trade and service-related foreign exchange transactions, but not under the "capital account," which includes foreign direct investment and loans, including loans we may secure from our onshore subsidiaries. Currently, certain of our PRC subsidiaries may purchase foreign currency for settlement of "current account transactions," including payment of dividends to us, without the approval of the SAFE by complying with certain procedural requirements. However, the relevant PRC governmental authorities may limit or eliminate our ability to purchase foreign currencies in the future for current account transactions. Foreign exchange transactions under the capital account remain subject to limitations and require approvals from, or registration with, the SAFE and other relevant PRC governmental authorities. Since a part of our future net income and cash flow will be denominated in Renminbi, any existing and future restrictions on currency exchange may limit our ability to utilize cash generated in Renminbi to fund our business activities outside of the PRC or pay dividends in foreign currencies to our shareholders, including holders of our Class A ordinary shares, and may limit our ability to obtain foreign currency through debt or equity financing for our subsidiaries.

The Regulations on Mergers and Acquisitions of Domestic Companies by Foreign Investors, or the M&A Rules, adopted by six PRC regulatory agencies in August 2006 and amended in June 2009, and some other regulations and rules concerning mergers and acquisitions established additional procedures and requirements that could make merger and acquisition activities by foreign investors more time consuming and complex, including requirements in some instances that shall obtained an approval from the Ministry of Commerce, or the MOFCOM, in advance of any change-of-control transaction in which a foreign investor takes control of a PRC domestic enterprise. Moreover, the Anti-Monopoly Law requires that the MOFCOM shall be notified in advance of any concentration of undertaking if certain thresholds are triggered. In addition, the Safety Review System for Merger and Acquisition of Domestic Companies by Foreign Investors issued by the MOFCOM that became effective in September 2011 specify that mergers and acquisitions by foreign investors that raise "national defense and security" concerns and mergers and acquisitions through which foreign investors may acquire de facto control over domestic enterprises that raise "national security" concerns are subject to strict review by the MOFCOM, and the rules prohibit any activities attempting to bypass a security review, including by structuring the transaction through a proxy or contractual control arrangement. In the future, we may grow our business by acquiring complementary businesses. Complying with the requirements of the above-mentioned regulations and other relevant rules to complete such transactions could be time consuming, and any required approval processes, including obtaining approval from the MOFCOM or its local counterparts may delay or inhibit our ability to complete such transactions, which could affect our ability to expand our business or maintain our market share.

Pursuant to the Notices on Issues concerning the Foreign Exchange Administration for Domestic Individuals Participating in a Stock Incentive Plan of an Overseas Publicly-Listed Company issued by SAFE on February 15, 2012, or Circular 7, a qualified PRC agent (which could be the PRC subsidiary of the overseas-listed company) is required to file, on behalf of "domestic individuals" (both PRC residents and non-PRC residents who reside in China for a continuous period of not less than one year, excluding the foreign diplomatic personnel and representatives of international organizations) who are granted shares or share options by the overseas-listed company according to its share incentive plan, an application with SAFE to conduct SAFE registration with respect to such share incentive plan, and obtain approval for an annual allowance with respect to the purchase of foreign exchange in connection with the share purchase or share option exercise. Such PRC individuals' foreign exchange income received from the sale of shares and dividends distributed by the overseas listed company and any other income shall be fully remitted into a collective foreign currency account in China, which is opened and managed by the PRC domestic agent before distribution to such individuals. In addition, such domestic individuals must also retain an overseas entrusted institution to handle matters in connection with their exercise of share options and their purchase and sale of shares. The PRC domestic agent also needs to update registration with SAFE within three months after the overseas-listed company materially changes its share incentive plan or make any new share incentive plans. We have adopted our Amended and Restated 2020 Share Incentive Plan (the "2020 Plan"), effective upon the completion of our initial public offering, and our 2021 Share Incentive Plan (the "2021 Plan"), effective upon shareholder approval at the 2021 annual general meeting of shareholders held on December 15, 2021. As of the date of this annual report, we have granted 189,066 restricted share awards under the 2020 Plan and we did not grant any awards under the 2021 Plan. We may grant share incentive awards under both or either plan in the future. When we do, from time to time, we need to apply for or update our registration with SAFE or its local branches on behalf of our employees or consultants who receive options or other equity-based incentive grants under the 2020 Plan, 2021 Plan or future share incentive plans we may adopt or material changes in such plan(s). However, we may not always be able to make applications or update our registration on behalf of our employees or consultants who hold any type of share incentive awards in compliance with Circular 7, nor can we ensure you that such applications or update of registration will be successful. If we or the participants of our share incentive plan(s) who are PRC citizens fail to comply with Circular 7, we and/or such participants of our share incentive plan(s) may be subject to fines and legal sanctions, there may be additional restrictions on the ability of such participants to exercise their share options or remit proceeds gained from sale of their shares into China, and we may be prevented from further granting share incentive awards under our share incentive plan(s) to our employees or consultants who are PRC citizens.

The national laws of the PRC (the "National Laws"), including, but not limited to (i) the Cybersecurity Review Measures which became effective on February 15, 2022; and (ii) approval by the CSRC or any other Chinese regulatory authority to approve or permit our offering of securities in the U.S., do not currently apply to our Hong Kong subsidiaries, except for those set forth below. However, due to the uncertainty of the PRC legal system and changes in laws, regulations or policies, including how these laws, regulations or policies would be interpreted or implemented, and the national laws applicable in Hong Kong, the Basic Law might be revised in the future. Pursuant to Article 18 of the Basic Law of the Hong Kong Special Administrative Region of the PRC (the "Basic Law"), "The laws in force in the Hong Kong Special Administrative Region shall be the Basic Law, the laws previously in force in Hong Kong as provided for in Article 8 of this Law, and the laws enacted by the legislature of the Region. National laws shall not be applied in the Hong Kong Special Administrative Region except for those listed in Annex III to the Basic Law. The laws listed therein shall be applied locally by way of promulgation or legislation by the Region. Also, regarding the Annex III and several Instruments of the Basic Law, National Laws, which have applied in Hong Kong until now are as following: Resolution on the Capital, Calendar, National Anthem and National Flag of the PRC; Resolution on the National Day of the PRC; Declaration of the Government of the PRC on the Territorial Sea; Nationality Law of the PRC; Regulations of the PRC Concerning Diplomatic Privileges and Immunities; Law of the PRC on the National Flag; Regulations of the PRC Concerning Consular Privileges and Immunities; Law of the PRC on the National Emblem; Law of the PRC on the Territorial Sea and the Contiguous Zone; Law of the PRC on Garrisoning the Hong Kong Special Administrative Region; Law of the PRC on the Exclusive Economic Zone and the Continental Shelf; Law of the PRC on Judicial Immunity from Compulsory Measures Concerning the Property of Foreign Central Banks; and Law of the PRC on the National Anthem; Law of the PRC on Safeguarding National Security in the Hong Kong Special Administrative Region. The CSRC released, on December 24, 2021, the Provisions of the State Council on the Administration of Domestic Companies Offering Securities for Overseas Listing (Revision Draft for Comments) (the "Provisions") and the Administrative Measures for the Filing of Domestic Companies Seeking Overseas Securities Offering and Listing (the "Measures") for public comment. According to the Provisions and Measures, "Domestic companies that seek to offer and list securities in overseas markets shall fulfill the filing procedure with the securities regulatory agency under the State Council and report relevant information;" and "An overseas offering and listing is prohibited under any of the following circumstances: (1) if the intended securities offering and listing falls under specific clauses in national laws and regulations and relevant provisions prohibiting such financing activities." Furthermore, the Cybersecurity Review Measures (2021) was officially released to the public on December 28, 2021 and became effective on February 15, 2022. According to the Cybersecurity Review Measures (2021), "To go public abroad, an online platform operator who possesses the personal information of more than 1 million users shall declare to the Office of Cybersecurity Review for cybersecurity review." As of the date of this annual report, we have two wholly-owned subsidiaries and operating entities established in Hong Kong, Ebang Communications (HK) Technology Limited, or HK Ebang Communications, principally for the trading of blockchain chips; and HongKong Ebang Digital Technology Limited, or HK Ebang Digital, principally for cryptocurrency exchange businesses. Neither entities have established any subsidiary or branch in PRC or have committed any business operations in PRC. For additional information, see "Item 4. Information of the Company – C. Organizational Structure." Based on the aforementioned Basic Law, our Hong Kong subsidiaries are not subject to the Cybersecurity Measures and the Provisions and the Measures. However, due to the uncertainty of the PRC legal system and changes in laws, regulations or policies, including how these laws, regulations or policies would be interpreted or implemented, the national laws applicable in Hong Kong in the Basic Law might be revised in the future. Therefore, we cannot assure you that we will not be affected by the foregoing or relevant laws, regulations or policies in the future. If there are any changes to the foregoing laws, regulations and policies, or if any new laws, regulations, and policies, etc., would be published, we would manage to comply with the changed laws, regulations and policies. However, we could not guarantee that the relevant laws, regulations, or policies would not be applied retroactively, so we might face penalties, and our reputation and results of operations could be materially and adversely affected.

Our customers are based globally. As such, changes in government policies, taxes, general economic and fiscal conditions, as well as political, diplomatic or social events, expose us to financial and business risks. In particular, changes in domestic or overseas policies and laws regarding holding, using and/or mining of Bitcoin could result in an adverse effect on our business operations and results of operations. Moreover, if any domestic or international jurisdiction where we operate or sell our Bitcoin mining machines prohibits or restricts Bitcoin mining activities, we may face legal and other liabilities and will experience a material loss of revenue. There are significant uncertainties regarding future regulations pertaining to the holding, using or mining of Bitcoin, which may adversely affect our results of operations. While Bitcoin has gradually gained more market acceptance and attention, it is anonymous and may be used for black market transactions, money laundering, illegal activities or tax evasion. As a result, governments may seek to regulate, restrict, control or ban the holding, use mining holding of Bitcoin. In addition, due to compliance risk, cost, government regulation or public pressure, banks and financial institutions may not provide banking services, or may cut off services, to businesses that provide cryptocurrency-related services or that accept cryptocurrencies, including Bitcoin, as payment. Our existing policies and procedures for the detection and prevention of money laundering and terrorism-funding activities through our business activities have only been adopted in recent years and may not completely eliminate instances in which we or our products may be used by other parties to engage in money laundering and other illegal or improper activities. We cannot assure you that there will not be a failure in detecting money laundering or other illegal or improper activities which may adversely affect our reputation, business, financial condition and results of operations. With advances in technology, cryptocurrencies are likely to undergo significant changes in the future. It remains uncertain whether Bitcoin will be able to cope with, or benefit from, those changes. In addition, as Bitcoin mining employs sophisticated and high computing power devices that need to consume large amounts of electricity to operate, future developments in the regulation of energy consumption, including possible restrictions on energy usage in the jurisdictions where we sell our products, may also affect our business operations and the demand for our current Bitcoin mining machines. There has been negative public reaction to the environmental impact of Bitcoin mining, particularly the large consumption of electricity, and governments of various jurisdictions have responded. For example, pursuant to the Notification No. 1283, new virtual currency mining projects are forbidden to apply for electricity facility installation, and the electricity facility installation shall be strictly reviewed. It is not permissible to supply power to virtual currency mining enterprises in any name, and all applications for electricity facility installation projects in progress shall be stopped. In the United States, certain local governments of the state of Washington have discussed measures to address the environmental impacts of Bitcoin-related operations, such as the high electricity consumption of Bitcoin mining activities. Any legislation and increased regulation regarding climate change could impose significant costs on us and our suppliers, including costs related to increased energy requirements, capital equipment, environmental monitoring and reporting, and other costs to comply with such regulations. Specifically, imposition of a carbon tax or other regulatory fee in a jurisdiction where we operate or on electricity that we purchase could result in substantially higher energy costs, and due to the significant amount of electrical power required to operate cryptocurrency mining machines, could in turn put our facilities at a competitive disadvantage. Any future climate change regulations could also negatively impact our ability to compete with companies situated in areas not subject to such limitations. Given the political significance and uncertainty around the impact of climate change and how it should be addressed, we cannot predict how legislation and regulation will affect our financial condition, operating performance and ability to compete. Furthermore, even without such regulation, increased awareness and any adverse publicity in the global marketplace about potential impacts on climate change by us or other companies in our industry could harm our reputation. Any of the foregoing could have a material adverse effect on our financial position, results of operations and cash flows.

We currently export our products to various overseas markets, have established two cryptocurrency exchange platforms and one cross-border payment and foreign exchange platform, and we intend to further develop our business and operations in the future to provide Fintech businesses in overseas jurisdictions, including, but not limited to, Singapore, Hong Kong, Australia, New Zealand, the Bahamas, the United States and Malaysia. Our blockchain products business and Fintech businesses could therefore be significantly affected by regulatory developments in jurisdictions outside the PRC, including the United States and other jurisdictions. Certain aspects of our business are subject to extensive laws, rules, regulations, policies and legal and regulatory guidance, including those governing securities, commodities, cryptocurrency asset custody, exchange and transfer, data governance, data protection, cybersecurity and tax. Many of these legal and regulatory regimes were adopted prior to the advent of the Internet, mobile technologies, cryptocurrency assets and related technologies. As a result, they do not contemplate or address unique issues associated with the crypto economy, are subject to significant uncertainty, and vary widely across federal, state and local laws, including the PRC and international jurisdictions. These legal and regulatory regimes, including the laws, rules and regulations thereunder, evolve frequently and may be modified, interpreted and applied in an inconsistent manner from one jurisdiction to another, and may conflict with one another. Moreover, the complexity and evolving nature of certain aspects of our business and the significant uncertainty surrounding the regulation of the crypto economy require us to exercise our judgement as to whether certain laws, rules and regulations apply to us, and it is possible that governmental bodies and regulators may disagree with our conclusions. In addition, governmental authorities that oversee certain aspects of the cryptocurrency markets, including those in the United States and other jurisdictions, have taken actions based on current laws and regulations, and are likely to continue to issue new laws, rules and regulations governing the cryptocurrency industry in which we currently operate and may operate in the future. As a result, and as discussed further in "- We are subject to risks associated with legal, political or other conditions or developments regarding holding, using or mining of Bitcoin, which could negatively affect our business, results of operations and financial position," existing and future regulations affecting the mining, holding, using, or transferring of cryptocurrencies may adversely affect our future business operations and results of operations, could subject us to significant fines and other regulatory consequences, and could result in our or our customers' liability for activities conducted by our customers. As described under "Item 4. Information on the Company-B. Business Overview-Regulation-Regulatory Overview of United States," United States federal and state securities laws may specifically limit our ability and the ability of our customers to use our blockchain and telecommunications products where these operations are conducted in connection with cryptocurrencies that are considered "securities" for purposes of United States laws. We have designed new chips for mining cryptocurrencies other than Bitcoin, and the likely status of these cryptocurrencies as securities could limit distributions, transfers, or other actions involving such cryptocurrencies, including mining, in the United States. For example, the distribution of cryptocurrencies to miners through the mining process could be deemed to involve an illegal offering or distribution of securities subject to United States federal or state laws. In addition, miners on cryptocurrency networks could, under certain circumstances, be viewed as statutory underwriters or as "brokers" subject to regulation under the Securities Exchange Act of 1934. This could require us or our customers to change, limit, or cease their mining operations, register as broker-dealers and comply with applicable laws, or be subject to penalties, including fines, or other regulatory consequences. In addition, we could face liability for facilitating their illegal activities. Further, if Bitcoin, Ethereum, or any other supported cryptocurrency or other digital asset is deemed to be a security under any United States federal, state, or foreign jurisdiction, or in a proceeding in a court of law or otherwise, it may have adverse consequences for such supported cryptocurrency or other digital asset, which could adversely affect our business, prospects, operations or financial condition. For instance, all transactions in such supported cryptocurrency or other digital asset would have to be registered with the SEC or other foreign authority, or conducted in accordance with an exemption from registration, which could severely limit its liquidity, usability and transactability. Moreover, the networks on which such supported cryptocurrency or digital assets are utilized may be required to be regulated as securities intermediaries, and subject to applicable rules, which could effectively render the network impracticable for its existing purposes. Further, it could draw negative publicity and a decline in the general acceptance of the cryptocurrency or other digital asset. Also, it may make it difficult for such supported cryptocurrency or other digital asset to be traded, cleared, and custodied as compared to other cryptocurrency or other digital assets that are not considered to be securities. Specifically, even if transactions in a cryptocurrency or other digital asset were registered with the SEC or conducted in accordance with an exemption from registration, the current intermediary-based framework for securities trading, clearances and settlements is not consistent with the operations of the digital asset market. For example, under current SEC guidance, cryptocurrency and other digital asset securities cannot be held on behalf of customers by broker-dealers that also support custody of traditional securities; and the SEC has not permitted public permissionless blockchain-based clearance and settlement systems for securities. In addition, cryptocurrencies and other digital assets are, in certain instances, subject to additional U.S. laws and regulations related to transactions in commodities as enforced by the Commodity Futures Trading Commission, or CFTC, and to money transmission, money service business, anti-money laundering, and know-your-customer activities as enforced by the Department of the Treasury's Financial Crimes Enforcement Network, or FinCEN, and by state governments. We or our customers could be subject to regulatory restrictions or regulatory actions based on these laws and regulations. Under the Investment Company Act of 1940, as amended, a company may fall within the definition of an investment company under section 3(c)(1)(A) thereof if it is or holds itself out as being engaged primarily, or proposes to engage primarily in the business of investing, reinvesting or trading in securities, or under section 3(a)(1)(C) thereof if it is engaged or proposes to engage in business of investing, reinvesting, owning, holding, or trading in securities, and owns or proposes to acquire "investment securities" (as defined) having a value exceeding 40% of its total assets (exclusive of government securities and cash items) on an unconsolidated basis. There is no authoritative law, rule or binding guidance published by the SEC regarding the status of digital assets as "securities" or "investment securities" under the Investment Company Act. Although we believe that we are not engaged in the business of investing, reinvesting, or trading in investment securities, and we do not hold ourselves out as being primarily engaged, or proposing to engage primarily, in the business of investing, reinvesting or trading in securities, to the extent the digital assets which we own or otherwise acquire may be deemed "securities" or "investment securities" by the SEC or a court of competent jurisdiction, we may meet the definition of an investment company. If we fall within the definition of an investment company under the Investment Company Act, we would be required to register with the SEC. If an investment company fails to register, it likely would have to stop doing almost all business, and its contracts would become voidable. Generally non-U.S. issuers may not register as an investment company without an SEC order. Cryptocurrencies and digital assets are recent technological innovations, and the regulatory schemes to which digital assets and their related exchanges may be subject have not been fully explored or developed by foreign jurisdictions. Thus, cryptocurrencies and other digital assets face an uncertain regulatory landscape in many foreign jurisdictions. Various foreign jurisdictions may from time to time adopt laws, regulations or directives that affect our cryptocurrency businesses. Due in part to its international nature and the nascent stage of regulation, along with the limited experience with cryptocurrencies and digital assets, and language barriers between international journalists, translators and regulators, information regarding the regulation of cryptocurrencies and other digital assets in various jurisdictions may be incomplete, inaccurate or unreliable. As both the regulatory landscape develops and journalistic familiarity with cryptocurrencies and other digital assets increase, mainstream media's understanding of cryptocurrencies, digital assets, and the regulation thereof may improve. As we enter into the markets in Australia, Singapore, the Bahamas, Hong Kong, New Zealand and the United States, we have retained local regulatory counsel and expect to continue to monitor the local regulations regarding cryptocurrencies, digital assets, and financial service platforms. We expect that regulations governing our current and planned business operations will vary from country to country as well as within countries. We cannot assure you that we will be familiar with local laws and regulations at all times when we establish digital asset and financial services platform businesses or develop any other business and operations in a foreign country. An increase in the regulation of such operations may affect our proposed businesses by increasing compliance costs or prohibiting certain or all of our proposed activities. In addition, existing and proposed laws and regulations can delay or impede the development of new products, result in negative publicity, decrease demand for our products, require significant management time and attention, and subject us to claims or other remedies, including fines or demands that we modify or cease existing business practices. Furthermore, any action brought against us or our customers by a foreign regulator, or by an individual in a private action, based on foreign law could cause us or our customers to incur significant legal expenses and divert our management's attention from the operation of the business. If our or our customers' operations are found to be in violation of any laws and regulations, we or they may be subject to penalties associated with the violation, including civil and criminal penalties, damages and fines. This could in turn require us to curtail or cease all or some operations. Regulatory action or regulatory change could also decrease demand for our products and services, which would be harmful to the success of our business.

In July 2014, the State Administration of Foreign Exchange of the PRC, or SAFE, promulgated the Circular on Relevant Issues Concerning Foreign Exchange Control on Domestic Residents' Offshore Investment and Financing and Roundtrip Investment through Special Purpose Vehicles, or SAFE Circular 37, which replaces the previous SAFE Circular 75. SAFE Circular 37 requires PRC residents, including PRC individuals and PRC corporate entities, to register with SAFE or its local branches in connection with their direct or indirect offshore investment activities. SAFE Circular 37 is applicable to our shareholders who are PRC residents and may be applicable to any offshore acquisitions that we may make in the future. Under SAFE Circular 37, PRC residents who make, or have prior to the implementation of SAFE Circular 37 made, direct or indirect investments in offshore special purpose vehicles, or SPVs, are required to register such investments with SAFE or its local branches. In addition, any PRC resident who is a direct or indirect shareholder of an SPV, is required to update its registration with the local branch of SAFE with respect to that SPV, to reflect any material change. Moreover, any subsidiary of such SPV in China is required to urge the PRC resident shareholders to update their registration with the local branch of SAFE to reflect any material change. If any PRC resident shareholder of such SPV fails to make the required registration or to update the registration, the subsidiary of such SPV in China may be prohibited from distributing its profits or the proceeds from any capital reduction, share transfer or liquidation to the SPV, and the SPV may also be prohibited from making additional capital contributions into its subsidiaries in China. In February 2015, SAFE promulgated a Notice on Further Simplifying and Improving Foreign Exchange Administration Policy on Direct Investment, or SAFE Notice 13. Under SAFE Notice 13, applications for foreign exchange registration of inbound foreign direct investments and outbound direct investments, including those required under SAFE Circular 37, must be filed with qualified banks instead of SAFE. Qualified banks should examine the applications and accept registrations under the supervision of SAFE. We have used commercially reasonable efforts to notify PRC residents or entities who directly or indirectly hold shares in our Cayman Islands holding company and who are known to us as being PRC residents to complete the foreign exchange registrations. However, we may not be informed of the identities of all the PRC residents or entities holding direct or indirect interest in our company, nor can we compel our beneficial owners to comply with SAFE registration requirements. We cannot assure you that all other shareholders or beneficial owners of ours who are PRC residents or entities have complied with, and will in the future make, obtain or update any applicable registrations or approvals required by, SAFE regulations. Failure by such shareholders or beneficial owners to comply with SAFE regulations, or failure by us to amend the foreign exchange registrations of our PRC subsidiaries, could subject us to fines or legal sanctions, restrict our overseas or cross-border investment activities, limit our PRC subsidiaries' ability to make distributions or pay dividends to us or affect our ownership structure, which could adversely affect our business and prospects. Furthermore, as these foreign exchange and outbound investment related regulations are relatively new and their interpretation and implementation has been constantly evolving, it is unclear how these regulations, and any future regulation concerning offshore or cross-border investments and transactions, will be interpreted, amended and implemented by the relevant government authorities. For example, we may be subject to a more stringent review and approval process with respect to our foreign exchange activities, such as remittance of dividends and foreign-currency-denominated borrowings, which may adversely affect our financial condition and results of operations. We cannot assure you that we have complied or will be able to comply with all applicable foreign exchange and outbound investment related regulations. In addition, if we decide to acquire a PRC domestic company, we cannot assure you that we or the owners of such company, as the case may be, will be able to obtain the necessary approvals or complete the necessary filings and registrations required by the foreign exchange regulations. This may restrict our ability to implement our acquisition strategy and could adversely affect our business and prospects.

Our PRC subsidiaries are subject to the PRC corporate income tax at a standard rate of 25% on their taxable income, but in 2020, 2021 and 2022, preferential tax treatment was available to three (3) of our PRC subsidiaries. Zhejiang Ebang obtained the "high-tech enterprise" tax status in November 2017, which reduced its statutory income tax rate to 15% from November 2017 to November 2020. Zhejiang Ebang further re-applied and obtained the "high-tech enterprise" tax status for three years from December 2020. Hangzhou Dewang Information Technology Co., Ltd., or Hangzhou Dewang, obtained the "high-tech enterprise" tax status in November 2018, which reduced its statutory income tax rate to 15% from November 2018 to November 2021. Hangzhou Dewang further re-applied and obtained the tax status "high-tech enterprise" tax for the three-year period start from December 2021. In addition, Zhejiang Ebang Information Technology Co., Ltd., or Ebang IT, obtained the "high-tech enterprise" tax status in December 2021, which reduced its statutory income tax rate to 15% from December 2021 to December 2023. We cannot assure you that the PRC policies on preferential tax treatments will not change or that the current preferential tax treatments we enjoy or will be entitled to enjoy will not be canceled. Moreover, we cannot assure you that our PRC subsidiaries will be able to renew the same preferential tax treatments upon expiration. If any such change, cancelation or discontinuation of preferential tax treatment occurs, the relevant PRC subsidiaries will be subject to the PRC enterprise income tax, or EIT, at a rate of 25% on taxable income. As a result, the increase in our tax charge could materially and adversely affect our results of operations.

Under the EIT Law and its implementation rules, enterprises established outside of the PRC with "de facto management bodies" within the PRC are considered a "resident enterprise" and will be subject to EIT at a rate of 25% on their worldwide income. The implementation rules under EIT define the term "de facto management bodies" as "establishments that carry out substantial and overall management and control over the production, operation, personnel, accounting, properties, etc. of an enterprise." The State Administration of Taxation of the PRC, or the SAT promulgated the Notice Regarding the Determination of Chinese-Controlled Offshore Incorporated Enterprises as PRC Tax Resident Enterprises on the Basis of De Facto Management Bodies, or Circular 82, on April 22, 2009, as amended on November 8, 2013, provides certain specific criteria for determining whether the "de facto management body" of a Chinese-controlled offshore incorporated enterprise is located in the PRC. On July 27, 2011, the SAT issued the Measures for Administration of Income Tax of Chinese Controlled Resident Enterprises Incorporated Overseas (Trial), or Circular 45, as amended on June 15, 2018, to supplement Circular 82 and other tax laws and regulations. Circular 45 clarifies certain issues relating to resident status determination. Although Circular 82 and Circular 45 apply only to offshore enterprises controlled by PRC enterprises or PRC group companies and not those controlled by PRC individuals or foreigners, the determining criteria set forth in Circular 82 and Circular 45 may reflect the SAT's general position on how the "de facto management body" test should be applied in determining the tax resident status of offshore enterprises, regardless of whether they are controlled by PRC enterprises or individuals or foreign enterprises. A substantial majority of our senior management team is located in China. If our company or any of our subsidiaries were considered to be a PRC "resident enterprise," we would be subject to EIT at a rate of 25% on our worldwide income, which could materially reduce our net income.

Due to the new and evolving nature of digital assets and the absence of comprehensive legal and tax guidance with respect to digital asset products, services and transactions, many significant aspects of the U.S. and foreign tax treatment of transactions involving digital assets, such as the purchase and sale of cryptocurrency assets on our platform, as well as the provision of staking rewards and other cryptocurrency asset incentives, are uncertain, and it is unclear whether, when and what guidance may be issued in the future on the treatment of cryptocurrency asset transactions for U.S. and foreign income tax purposes. In 2014, the IRS released Notice 2014-21, discussing certain aspects of "virtual currency" for U.S. federal income tax purposes and, in particular, stating that such virtual currency (i) is "property," (ii) is not "currency" for purposes of the rules relating to foreign currency gain or loss, and (iii) may be held as a capital asset. In 2019, the IRS released Revenue Ruling 2019-24 and a set of "Frequently Asked Questions" (which have been periodically updated), that provide additional guidance, including guidance to the effect that, under certain circumstances, hard forks of digital currencies are taxable events giving rise to ordinary income and guidance with respect to the determination of the tax basis of virtual currency. However, this guidance does not address other significant aspects of the U.S. federal income tax treatment of digital assets and related transactions. There continues to be uncertainty with respect to the timing, character and amount of income inclusions for various digital asset transactions including, but not limited to lending and borrowing digital assets, staking rewards and other digital asset incentives that we offer. Although we believe our treatment of digital asset transactions for federal income tax purposes is consistent with existing guidance provided by the IRS and existing U.S. federal income tax principles, because of the rapidly evolving nature of digital asset innovations and the increasing variety and complexity of digital asset transactions and products, it is possible the IRS and various U.S. states may disagree with our treatment of certain digital asset offerings for U.S. tax purposes, which could adversely affect our customers and the vitality of our business and platforms. There can be no assurance that the IRS, the U.S. state revenue agencies or other foreign tax authorities, will not alter their respective positions with respect to digital assets in the future or that a court would uphold the treatment set forth in existing guidance. It also is unclear what additional guidance may be issued in the future on the treatment of existing digital asset transactions and future digital asset innovations for purposes of U.S. tax or other foreign tax regulations. Any such alteration of existing IRS, U.S. state and foreign tax authority positions or additional guidance regarding digital asset products and transactions could result in adverse tax consequences for holders of digital assets and could have an adverse effect on the value of digital assets and the broader digital asset markets. Future technological and operational developments that may arise with respect to digital assets may increase the uncertainty with respect to the treatment of digital assets for U.S. and foreign tax purposes. The uncertainty regarding tax treatment of digital asset transactions impacts our customers, and could impact our business, both domestically and abroad.

Due to the nature of our operations, we are subject to the risks of potential liability associated with industrial accidents at our production facilities. We cannot assure you that industrial accidents, whether due to malfunction of equipment or other reasons, will not occur in the future at our production facilities. Under such circumstances, we may be subject to employee claims for compensation or penalties imposed by relevant government authorities and may suffer damage to our reputation. In addition, we may experience interruptions in our operations or may be required to change the manner in which we operate, as a result of governmental investigations or the implementation of safety measures due to accidents. Any of the foregoing events could materially and adversely affect our business, financial condition and results of operations.

We manufacture products in accordance with internationally accepted quality standards and specifications provided by our customers. However, we cannot assure you that all products produced by us are free of defects. Consequently, any product defects identified by our customers or end users might erode our reputation and negatively affect our customer relationships and future business. Product defects may also result in product returns and large-scale product recalls or product liability claims against us for substantial damages. Such claims, irrespective of the outcomes or the merits, would likely be time-consuming and costly to defend and could divert significant resources and management attention. Furthermore, even if we are able to defend any such claim successfully, we cannot assure you that our customers will not lose confidence in our products or that our future relationships with our customers will not be damaged. As a result, our business, results of operations, reputation and brand image could be materially and adversely affected by any product defects.

We place great emphasis on product quality and adhere to stringent quality control measures and have obtained quality control certifications for our products. To meet our customers' requirements and expectations for the quality and safety of our products, we have adopted a stringent quality control system to ensure that every step of the production process is strictly monitored and managed. Failure to maintain an effective quality control system or to obtain or renew our quality standards certifications may result in a decrease in demand for our products or cancellation or loss of purchase orders from our customers. Moreover, our reputation could be impaired. As a result, our business and results of operations could be materially and adversely affected.

Since our inception, the growth and expansion of our business operations have been dependent upon the business strategies and foresight of our senior management. Our future success depends, in large part, on the continued contributions of our senior management team, specifically Mr. Dong Hu. In addition, our future success depends on our ability to retain, attract and incentivize qualified personnel, including our management, sales, marketing, finance and especially research and development personnel. As the driver of our technological and product innovations, our research and development personnel represent a very significant asset of ours. As the technology in the semiconductor and blockchain industries are advancing at a quick pace, there is an increasing need for skilled engineers. Many companies across the world are struggling to find suitable candidates for their research and development positions. The process of hiring employees with the combination of skills and characteristics required to implement our strategy can be extremely competitive and time-consuming. We cannot assure you that we will be able to attract adequate personnel as we continue to pursue our business strategies. Moreover, we cannot assure you that we will be able to retain key existing employees. The loss of any of our founder, senior management or research and development team members could harm our ability to implement our business strategies and respond to the rapidly changing market conditions in which we operate, or could result in other operating risks. The loss of one or more of our key employees, especially our key design and technical personnel, or our inability to retain, attract and motivate qualified design and technical personnel, could have a material adverse effect on our business, financial condition and results of operations.

Our operations are subject to the labor, work safety and environmental protection laws and regulations promulgated by the PRC government. These laws and regulations require us to pay social insurance, maintain safe working conditions and adopt effective measures to control and properly dispose of solid waste and other environmental pollutants. We could be exposed to penalties, fines, suspensions or actions in other forms if we fail to comply with these laws and regulations. The laws and regulations in the PRC may be amended from time to time and changes in those laws and regulations may cause us to incur additional costs in order to comply with the more stringent rules. In the event that changes to existing laws and regulations require us to incur additional compliance costs or require costly changes to our production process, our costs could increase and we may suffer a decline in sales for certain products, as a result of which our business, financial conditions and results of operations could be materially and adversely affected.

The average wage in China has increased in recent years and is expected to continue to grow. The average wage level for our PRC subsidiaries' employees has also increased in recent years. We expect that our PRC subsidiaries' labor costs, including wages and employee benefits, will continue to increase. Unless we are able to pass on these increased labor costs to our customers, our profitability and results of operations may be materially and adversely affected. In addition, our PRC subsidiaries have been subject to stricter regulatory requirements in terms of entering into labor contracts with our employees and paying various statutory employee benefits, including pensions, housing funds, medical insurance, work-related injury insurance, unemployment insurance and maternity insurance to designated government agencies for the benefit of our PRC subsidiaries' employees. Pursuant to the PRC Labor Contract Law and its implementation rules, employers are subject to stricter requirements in terms of signing labor contracts, minimum wages, paying remuneration, determining the term of employee's probation and unilaterally terminating labor contracts. In the event that our PRC subsidiaries decide to terminate some of our PRC subsidiaries' employees or otherwise change their employment or labor practices, the PRC Labor Contract Law and its implementation rules may limit their ability to effect those changes in a desirable or cost-effective manner, which could adversely affect our business and results of operations. Pursuant to PRC laws and regulations, companies registered and operating in China are required to apply for social insurance registration and housing fund deposit registration within 30 days of their establishment and to pay for their employees different social insurance including pension insurance, medical insurance, work-related injury insurance, unemployment insurance and maternity insurance to the extent required by law. Our PRC subsidiaries have not fully paid social insurance and housing provident funds for all of their employees due to inconsistency in implementation or interpretation of the relevant PRC laws and regulations among government authorities in the PRC and, in some cases, voluntary decisions by the relevant employees. As the PRC government may enhance its enforcement measures relating to social insurance and housing fund deposit collection, our PRC subsidiaries may be required to make up the contributions for their employees, and may be further subjected to late fees payment and administrative fines, which may materially and adversely affect our financial condition and results of operations. As the interpretation and implementation of labor-related laws and regulations are still evolving, we cannot assure you that our PRC subsidiaries' current employment practices do not and will not violate labor-related laws and regulations in China, which may subject us to labor disputes or government investigations. In addition, we may incur additional expenses in order to comply with such laws and regulations, which may adversely affect our business and profitability.

Fabrication of IC chips requires specialized services to process the silicon wafers into IC chips by packaging them and to test their proper functioning. We rely on a limited number of production partners for such packaging and testing services. We have worked closely with world-class outsourced semiconductor assembly and test, or OSAT, companies on a limited number of specialized production partners exposes us to a number of risks, including difficulties in finding alternate suppliers, capacity shortages or delays, lack of control or oversight in timing, quality or costs, and misuse of our intellectual property. If any such problems arise with our OSAT partners, we may experience delays in our production and delivery timeline, inadequate quality control of our products or excessive costs and expenses. As a result, our financial condition, results of operation, reputation and business may be adversely affected.

The ASIC chip is the key component of a mining machine as it determines the efficiency of the device. Currently, only a small number of wafer foundries in the world are capable of producing the highly sophisticated silicon wafers used for ASIC chips. Therefore, the ability to source high-quality wafers is a major barrier to entry for new entrants and has provided us with a great competitive advantage in the market. In 2020, 2021 and 2022, all of our ASIC wafers were fabricated by Samsung. We principally purchased ASIC chips either directly from Samsung or through intermediaries that purchased from Samsung. However, this arrangement does not guarantee that Samsung will reserve foundry capacity for us, which we believe is in line with market arrangements with other wafer foundries.   As such, there are risks that Samsung may be unable to accept our purchase orders or continue their supply of ASIC wafers to us. Such changes may result in delays to our production, which could negatively affect our reputation and results of operations. In order to diversify our ASIC chips suppliers, we have established working relations with Taiwan Semiconductor Manufacturing Company, Limited, or TSMC, since November 2017. However, we cannot guarantee that we will be able to continue to source ASIC wafers from Samsung or TSMC on the same or similar terms or in a timely manner, or start to source ASIC wafers from other suppliers. In addition, replacing a supplier may require that we divert attention and resources away from our business. We may also suffer lower gross profit margins if we fail to pass on any additional costs to our customers. As a result, a change in our relationship with Samsung or TSMC could have a significant negative impact on our business, financial condition and results of operation. We depend on a limited number of suppliers to allocate to us a portion of their manufacturing capacity sufficient to meet our needs, to produce products of acceptable quality and at acceptable final test yields, and to deliver those products to us on a timely basis and at acceptable prices. These suppliers may raise prices or may be unable to meet our required capacity for any reason, such as shortages or delays in the shipment of semiconductor equipment or raw materials required to manufacture our ICs. In particular, we have experienced a global shortage in semiconductors from 2021 to the first half of 2022, which has and may continue to adversely impact the production activity and capacity of our third-party foundry partners. If these third-party foundry partners fail to succeed in their technology migration or secure enough semiconductors, they will not be able to deliver to us qualified ICs in a sufficient amount, which will significantly affect our technological advancement and shipment of Bitcoin mining machines. This could in turn result in lost sales and have a material adverse effect on our relationships with our customers and on our business and financial condition. In addition, our business relationships with the suppliers may deteriorate. For example, in November 2019, we brought a legal action against a then-major supplier for breach of contract for delivering defective products. Under such circumstances, we may not be able to obtain the required capacity and would have to seek alternative suppliers, which may not be available on commercially reasonable terms, or at all. Moreover, it is possible that other customers of these suppliers that are larger and/or better financed than we are, or that have long-term contracts with them, may receive preferential treatment in terms of capacity allocation or pricing. In addition, if we do not accurately forecast our capacity needs, these suppliers may not have available capacity to meet our immediate needs or we may be required to pay higher costs to fulfill those needs, either of which could materially and adversely affect our business, financial condition and results of operations. In particular, the production of our ASICs may require advanced IC fabrication technologies. Foundries other than Samsung or TSMC, however, might not have sufficient production capacity for such technologies, or at all, to meet our requirements. This may expose us to risks associated with engaging new foundries. For example, using foundries with which we have not established relationships could expose us to potentially unfavorable pricing, unsatisfactory quality or insufficient capacity allocation. Other risks associated with the concentration of third-party foundry suppliers include limited control over delivery schedules and quality assurance, lack of capacity in periods of excess demand, unauthorized use of our intellectual property and limited ability to manage inventory and parts. In particular, although we have entered into confidentiality agreements with our third-party foundry suppliers for the protection of our intellectual property, it may not protect our intellectual property with the same degree of care as we use to protect our intellectual property. If we fail to properly manage any of these risks, our business and results of operations may be materially and adversely affected. Moreover, if Samsung or TSMC suffers any damage to its facilities, suspends manufacturing operations, loses benefits under material agreements, experiences power outages or computer virus attacks, lacks sufficient capacity to manufacture our products, encounters financial difficulties, is unable to secure necessary raw materials from its suppliers or suffers any other disruption or reduction in efficiency, we may encounter supply delays or disruptions.

We rely on third-party suppliers and service providers to provide quality products and services to customers, and our brand and reputation may be harmed by actions taken by them that are beyond our control. Despite the measures we have taken to ensure the quality of products and services provided by third-party suppliers and service providers, to the extent that there are manufacturing defects beyond our control, or our third-party suppliers and service providers are unable to maintain the efficiency of their production facilities, supply sufficient components or raw materials in a timely manner, or provide satisfactory services to our customers, we may suffer reputational damage, and our brand image, business and results of operations may be materially and adversely affected.

We set prices for our mining machines and telecommunication products based on a number of internal and external factors, such as the cost of production, the technological contents of our products, market conditions, and competition we face. Our ability to set favorable prices at our desired margins and to accurately estimate costs, among other factors, has a significant impact on our profitability. We cannot assure you that we will be able to maintain our pricing or bargaining power or that our gross profit margin will not be driven down by market conditions or other factors. If we see higher pricing pressure due to intensified competition from other manufacturers as our competitors' products may be more technologically advanced or energy-efficient, decreases in prices to our customers in the end market or any other reasons, or if we otherwise lose bargaining power due to weaker demand for our products, we may need to reduce the prices and lower the margins of our products and we may even be unable to continue to market our products at all. Moreover, we may not be able to accurately estimate our costs or pass on all or part of any increase in our costs of production, in particular the costs of raw materials, components and parts, to our customers.

To operate our business successfully and meet our customers' demands and expectations, we must maintain a certain level of finished goods inventory to ensure immediate delivery when required. We are also required to maintain an appropriate level of raw materials for our production. However, forecasts are inherently uncertain. If our forecasted demand is lower than what eventually transpires, we may not be able to maintain an adequate inventory level of our finished goods or produce our products in a timely manner, and we may lose sales and market share to our competitors. On the other hand, we may also be exposed to increased inventory risks due to accumulated excess inventory of our products or raw materials, parts and components for our products. Excess inventory levels may lead to increases in inventory holding costs, risks of inventory obsolescence and provisions for write-downs, which will materially and adversely affect our business, financial condition and results of operations. In order to maintain an appropriate inventory level of finished goods and raw materials to meet market demand, we adjust our procurement amount and production schedule from time to time based on customers' orders and anticipated demand. We also carry out an inventory review and an aging analysis on a regular basis. We make provision for obsolete and slow-moving inventory of raw materials and finished goods that are no longer suitable for use in production or sale. However, we cannot guarantee that these measures will always be effective and that we will be able to maintain an appropriate inventory level. We may also be exposed to the risk of holding excessive inventory, including older generation mining machines that are less marketable as well as older ASIC chips which may increase our inventory holding costs and subject us to the risk of inventory obsolescence or write-offs, which could have a material adverse effect on our business, results of operations and financial condition. For example, we recorded write-down for the potentially obsolete, slow-moving inventory and lower of cost or market adjustment of US$3.6 million, US$2.2 million and US$6.5 million in 2020, 2021 and 2022, respectively. If we cannot maintain an appropriate inventory level, we may lose sales and market share to our competitors.

Many of our blockchain customers engage in the cryptocurrency mining business. Cryptocurrency mining consumes a significant amount of energy power to process the computations and cool down the mining hardware. Therefore, a steady and inexpensive power supply is critical to cryptocurrency mining. There can be no assurance that the operations of our blockchain customers will not be affected by power shortages or an increase in energy prices in the future. In particular, the power supply could be disrupted by natural disasters, such as floods, mudslides and earthquakes, or other similar events beyond the control of our customers. Further, certain of our customers may experience power shortages due to seasonal variations in the supply of certain types of power such as hydroelectricity. Power shortages, power outages or increased power prices could adversely affect mining farm businesses of our blockchain customers and reduce the expected market demand for our mining machines significantly. Under such circumstances, our business, results of operations and financial condition could be materially and adversely affected. In addition, as we intend to establish and operate mining farms to provide hosting services for third parties and engage in proprietary Bitcoin and other cryptocurrency mining activities to mine cryptocurrencies for ourselves in the near future, any increase in energy prices or a shortage in power supply in locations where our future mining farms are located may increase our potential mining costs and reduce the expected economic returns from our proprietary mining operation significantly.

We do not maintain insurance policies covering all of our business risks, such as risks relating to properties, receivables, goods in transit and public liability. There is no assurance that the insurance coverage we do have would be sufficient to cover our potential losses. See the section headed "Item 4. Information on the Company-B. Business Overview--Insurance" for more information on the insurance policies maintained by us. In the event there is any damage to these items, we would have to pay for the difference ourselves where our cash flow and liquidity could be negatively affected.

Most of our revenues were and, a lot of revenues, in the foreseeable future, are expected to be derived in China, and a lot of our operations, including most of our manufacturing, is conducted in China. Accordingly, our business, prospects, results of operations and financial condition may be influenced to a significant degree by political, economic and social conditions in China generally and by continued economic growth in China as a whole. The Chinese economy differs from the economies of most developed countries in many respects, including the degree of government involvement, level of development, growth rate, control of foreign exchange and allocation of resources. Although the PRC government has implemented measures emphasizing the utilization of market forces for economic reform, the reduction of state ownership of productive assets and the establishment of improved corporate governance in business enterprises, a substantial portion of productive assets in China is still owned by the government. In addition, the Chinese government continues to play a significant role in regulating industry development by imposing industrial policies. The Chinese government also exercises significant control over China's economic growth through strategically allocating resources, controlling the payment of foreign currency-denominated obligations, setting monetary policy and providing preferential treatment to particular industries or companies. While the Chinese economy has experienced significant growth over the past decades, growth has been uneven, both geographically and among various sectors of the economy, and the rate of growth has been slowing since 2012. The Chinese government has implemented various measures to encourage economic growth and guide the allocation of resources. Some of these measures may benefit the overall Chinese economy but may have a negative effect on us. For example, our financial condition and results of operations may be adversely affected by government control over capital investments or changes in tax regulations. In addition, in the past the Chinese government has implemented certain measures, including interest rate increases, to control the pace of economic growth. These measures may cause decreased economic activity in China, and since 2012, and in particular in 2020 as a result of COVID-19, China's economic growth slowed down. Any prolonged slowdown in the Chinese economy may reduce the demand for our products and services and materially and adversely affect our business and results of operations.

Although the Chinese economy has grown steadily in the past decade, there is considerable uncertainty over the long-term effects of the expansionary monetary and fiscal policies adopted by the People's Bank of China and financial authorities of some of the world's leading economies, including the United States and China. The proposed tariffs by the U.S. government and the potential of a trade war between the U.S. and China could dampen the growth prospects of the Chinese and global economy. There have been concerns over unrest and terrorist threats in the Middle East, Europe and Africa, which have resulted in volatility in oil and other markets. There have also been concerns on the relationship among China and other Asian countries, which may result in or intensify potential conflicts in relation to territorial disputes. The ongoing war between Russian and Ukraine has escalated global geopolitical tensions when Russia launched a large-scale land invasion into Ukraine in February 2022. Economic conditions in China are sensitive to global economic conditions, as well as changes in domestic economic and political policies and the expected or perceived overall economic growth rate in China. Any severe or prolonged slowdown in the global or Chinese economy may materially and adversely affect our business, results of operations and financial condition.

Although we have begun to develop new chips for mining other cryptocurrencies, all of our revenue from sales of cryptocurrency mining machines was generated from the sale of mining machines designed for Bitcoin mining in 2020, 2021 and 2022. We face the risk that other cryptocurrencies could replace Bitcoin as the largest cryptocurrency, which may in turn negatively impact the value of Bitcoin and diminish interest in mining Bitcoin. Acceptance of Bitcoin may decline due to various reasons such as the following: - potential changes in Bitcoin's algorithms or source code that may negatively impact user acceptance;- patches, upgrades, attacks or hacking of Bitcoin's infrastructure that may undermine user interest or confidence;- usage of Bitcoin for illicit or illegal activities by bad actors that may erode public perception of Bitcoin; or - hacking, fraud or other problems with Bitcoin exchanges, wallets or other related infrastructure, that may negatively impact user confidence. If fewer people accept Bitcoin currency or fewer merchants accept Bitcoin as a payment method, Bitcoin may decline in value. Although Bitcoin is currently the largest cryptocurrency by market capitalization, a substantial amount of Bitcoin-related transactions may be speculation-related and a technological breakthrough in the form of a preferred cryptocurrency is a continuous threat. Digital asset technology is rapidly advancing and changing and new digital assets are created regularly. New digital assets competing with the digital assets we specialize in (such as Bitcoin) may increase in popularity and in turn cause a decline in the value of Bitcoin, which may in turn lead to a decline in the Bitcoin network and our ability to generate revenue from our current mining activities. This may include the development of so-called central bank digital currencies (CBCDs). Many governments around the world, and central banks are reportedly considering or studying the potential for CBCDs, including the Australian federal government and the Reserve Bank of Australia and the United States Federal Reserve. Other cryptocurrencies may be designed with algorithms that are not compatible with the kind of computing done by ASIC chip mining machines. If such a cryptocurrency were to become dominant, our existing technological know-how may not be applicable in creating hardware for participants in that cryptocurrency network, and we may face greater competition from new players. In addition, since the value of and support for Bitcoin depend entirely on the community using it, any disagreement between the users may result in the splitting of the network to support other cryptocurrencies and the users may sell all their Bitcoin and switch to other cryptocurrencies. As a result, our mining machines and our results of operations would be materially and adversely affected.

A key reason for Bitcoin and other cryptocurrencies to have attracted many new and committed users in a short period of time is its decentralized nature, or the lack of control by a central authority. However, there are divergent views on the decentralized nature of cryptocurrencies. For example, there are claims that most of the actual services and businesses built within the cryptocurrency ecosystem are in fact centralized since they are run by specific people, in specific locations, with specific computer systems, and that they are susceptible to specific regulations. Individuals, companies or groups, as well as cryptocurrency exchanges that control vast amounts of cryptocurrency can affect cryptocurrency's market prices. Furthermore, mining equipment production and mining pool locations may become centralized. The concerns or skepticism about the decentralized nature of Bitcoin may cause customers to lose confidence in the cryptocurrency industry's prospects. This in turn could adversely affect the market demand for our mining machines, the operation of our cryptocurrency exchanges and our business. Furthermore, the possibility that a person or a coordinated group of people may gain more than 50% control of the process power active on Bitcoin and be able to manipulate transactions, despite the intended decentralized structure, may also erode confidence in Bitcoin. Our business, prospects and results of operations therefore may adversely be affected by the divergent views on the decentralized nature of Bitcoin.

We derive our revenues from the sale of products and are subject to counterparty risks such as our customer's inability to pay. As of December 31, 2021 and 2022, our trade receivables amounted to US$9.9 million and US$3.3 million, respectively. There can be no assurance that we will be able to collect our trade receivables on a timely basis, and our trade receivable turnover days may increase, which in turn could materially and adversely affect our liquidity, financial condition and results of operations.

Cryptocurrency transactions are entirely digital and, as with any virtual system, face risk from hackers, malware and operational glitches. For example, hackers can target cryptocurrency exchanges, wallets, and custodians to gain unauthorized access to the private keys associated with the wallet addresses where cryptocurrencies are stored. Cryptocurrency transactions and accounts are not insured by any type of government program and cryptocurrency transactions generally are immutable by design. Certain features of cryptocurrency networks, such as decentralization, open source protocols, and reliance on peer-to-peer connectivity, may increase the risk of fraud or cyber attack by potentially reducing the likelihood of a coordinated response. Cryptocurrencies have been susceptible to hacking and several cryptocurrency exchanges and miners have reported cryptocurrency losses, which highlights concern over the security of cryptocurrencies and in turn affect the demand and the market price of cryptocurrencies. In addition, while cryptocurrencies use private key encryption to verify owners and register transactions, scammers and other bad actors may attempt to sell fraudulent digital assets. The techniques used to obtain unauthorized, improper, or illegal access to systems and information (including customers' personal data and digital assets), disable or degrade services, or sabotage systems are constantly evolving, may be difficult to detect quickly, and often are not recognized or detected until after they have been launched against a target. Additionally, certain threats are designed to remain dormant or undetectable until launched against a target and we may not be able to implement adequate preventative or protective measures. These risks may adversely affect the operation of the cryptocurrency network which would erode user confidence in digital assets, or in the use of technology to conduct financial transactions, which could negatively impact us, including the market perception of the effectiveness of our security measures, the technology infrastructure of our exchange platforms, and the demand for our mining machines. In particular, our cryptocurrency exchange business involves the collection, storage, processing, and transmission of confidential information, customer, employee, service provider, and other personal data, as well as information required to access customer assets. We have built our reputation on the premise that our platforms offer customers a secure way to purchase, store, and transact in digital assets. As a result, any actual or perceived security breach of our exchange platforms or our third-party partners may: - harm our reputation and brand;- result in our systems or services being unavailable and interrupt our operations;- result in improper disclosure of data and violations of applicable privacy and data protection laws;- result in significant regulatory scrutiny, investigations, fines, penalties, and other legal, regulatory, and financial exposure;- cause us to incur significant remediation costs;- lead to theft or irretrievable loss of our or our customers' fiat currencies or digital assets;- reduce customer confidence in, or decreased use of, our products and services;- divert the attention of management from the operation of our business;- result in significant compensation or contractual penalties from us to our customers or third parties as a result of losses to them or claims by them; and - adversely affect our business and operating results. Although we have developed systems and processes designed to protect the data we manage, prevent data loss and other security breaches, effectively respond to known and potential risks, and expect to continue to expend significant resources to bolster these protections, there can be no assurance that these security measures will provide absolute security or prevent breaches or attacks. As of the date of this annual report, we have not experienced breaches of our security measures, however, we may experience in the future, breaches of our security measures due to human error, malfeasance, insider threats, system errors, vulnerabilities, or other irregularities. Certain types of cyberattacks could harm us even if our systems are left undisturbed. Unauthorized parties may attempt to gain access to our systems and facilities, as well as those of our customers, partners, and third-party service providers, through various means, including hacking, social engineering, phishing, and attempting to fraudulently induce individuals (including employees, service providers, and customers) into disclosing usernames, passwords, payment card information, digital wallet information or other sensitive information, which may in turn be used to access our information technology systems and customers' digital assets. Threats can come from a variety of sources, including criminal hackers, hacktivists, state-sponsored intrusions, industrial espionage, and insiders. Certain threat actors may be supported by significant financial and technological resources, making them even more sophisticated and difficult to detect. We may also acquire other companies that expose us to unexpected security risks or increase costs to improve the security posture of the acquired company. As a result, our costs and the resources we devote to protecting against these advanced threats and their consequences may continue to increase over time.

Cryptocurrencies and other digital assets that are represented and trade on a ledger-based platform may not necessarily benefit from viable trading markets. Stock exchanges have listing requirements and vet issuers, requiring them to be subjected to rigorous listing standards and rules; and monitor investors transacting on such platform for fraud and other improprieties. These conditions may not necessarily be replicated on a distributed ledger platform, depending on the platform's controls and other policies. The more lax a distributed ledger platform is about vetting issuers of cryptocurrency and other digital assets or users that transact on the platform, the higher the potential risk for fraud or the manipulation of the ledger due to a control event. These factors may decrease liquidity or volume or may otherwise increase volatility of investment securities or other assets trading on a ledger-based system, which may adversely affect us. Such circumstances could have a material adverse effect on our ability to continue as a going concern or to pursue our business strategy at all, which could have a material adverse effect on our business, prospects or operations, and potentially the value of any Bitcoin or other cryptocurrencies or digital assets we acquire or hold for our own account, and so could harm investors.

Many cryptocurrency networks face significant scaling challenges. As the Bitcoin network continues to develop and grow, certain technical issues might be uncovered, and the troubleshooting and resolution of such issues requires the attention and efforts of Bitcoin's global development community. A number of second layer technology solutions have been recently promoted to resolve this problem by, among other things, enabling faster transactions: in August 2017, the Bitcoin network underwent a hard fork that resulted in the creation of a new digital asset network called Bitcoin Cash. This hard fork was contentious, and as a result some users of the Bitcoin Cash network may harbor ill will toward the Bitcoin network. These users may attempt to negatively impact the use or adoption of the Bitcoin network. Also in August 2017, the Bitcoin network was upgraded with a technical feature known as "Segregated Witness" that, among other things, potentially doubles the transactions per second that can be handled on-chain and enables so-called second layer solutions, such as the Lightning Network or payment channels, that have the potential to substantially increase transaction throughput (i.e., millions of transactions per second). As of the date of this annual report, digital wallets and intermediaries that support Segregated Witness or Lightning Network-like technologies do not yet have material adoption. In 2021, the Bitcoin protocol implemented the Taproot upgrade to add enhanced support for complex transactions on the network such as multi-signature transactions, which require two or more parties to execute a transaction on the Bitcoin network. Prior to the upgrade, multi-signature transactions were historically slow, expensive, and easily identifiable. Taproot is intended to reduce the amount of data written to a block and makes multi-signature transactions indistinguishable from regular transactions, adding an enhanced layer of privacy. This upgrade may fail to work as expected, which could lead to a decline in support and price of Bitcoin. Unfortunately, there is no assurance that the digital asset community will accept these solutions or that these solutions will work as expected or effectively resolve these problems. As the use of digital asset networks increases without a corresponding increase in throughput of the networks, average fees and settlement times can increase significantly. Bitcoin's network, for example, has been, at times, at capacity, which has led to very high transaction fees. Increased fees and decreased settlement speeds could preclude certain use cases for Bitcoin (e.g., micropayments), and can reduce demand for and the market price of Bitcoin, which could adversely affect the market demand for our mining machines. There is no guarantee that any of the mechanisms already in place or being explored for increasing the scale of settlement of Bitcoin transactions will be effective, or how long they will take to become effective, which could adversely affect the market demand for our mining machines.

Central banks in some countries have started to introduce digital forms of legal tender. For example, China's CBDC project was made available to consumers in January 2022, and governments from Russia to the European Union have been discussing potential creation of new digital currencies. A 2021 survey of central banks by the Bank for International Settlements found that 86% are actively researching the potential for CBDCs, 60% were experimenting with the technology and 14% were deploying pilot projects. Whether or not they incorporate blockchain or similar technology, CBDCs, as legal tender in the issuing jurisdiction, could have an advantage in competing with, or replace, Bitcoin and other cryptocurrencies as a medium of exchange or store of value. As a result, the value of Bitcoin could decrease, which could have a material adverse effect on our business, prospects, financial condition, and operating results.

Our customers include both enterprises and individuals. A limited number of our major customers, however, have contributed a significant portion of our revenues in the past. Our revenue from the top ten largest customers accounted for approximately 91%, 81% and 88% of our total revenues in 2020, 2021 and 2022. Although we continually seek to diversify our customer base, we cannot assure you that the proportion of the revenue contribution from these customers to our total revenues will decrease in the near future. We offer credit sales to our major, long-term customers. Dependence on a limited number of major customers will expose us to the risks of substantial losses and may increase our account receivables and extend its turn over days if any of them reduces or even ceases business collaborations with us. Specifically, any one of the following events, among others, may cause material fluctuations or declines in our revenues and have a material and adverse effect on our business, financial condition, results of operations and prospects: - an overall decline in the business of one or more of our significant customers;- the decision by one or more of our significant customers to switch to our competitors;- the reduction in the prices of our mining machines agreed by one or more of our significant customers; or - the failure or inability of any of our significant customers to make timely payment for our services. If we fail to maintain relationships with these major customers, and if we are unable to find replacement customers on commercially desirable terms or in a timely manner or at all, our business, financial condition, results of operations and prospects may be materially and adversely affected.

We have generated, and expect to generate in the foreseeable future, a significant portion of our revenues from sales of our Bitcoin mining machines. Sales of our Bitcoin mining machines and related accessories accounted for 42.3%, 77.3% and 79.8% of our revenues in 2020, 2021 and 2022, respectively. Revenues from provision of mining machine hosting services accounted for 48.1%, 5.5% and nil of our revenues in 2020, 2021 and 2022, respectively, as we have halted all mining machine custody services in the PRC at the end of April 2021. If the market for Bitcoin mining machines ceases to exist or diminishes significantly, we would experience a significant loss of sales, cancelation of orders, or loss of customers for our Bitcoin mining machines. Adverse factors that may affect the market for Bitcoin mining machines include: - Another cryptocurrency, especially one that is not created using the same mining processes as Bitcoin, displaces Bitcoin as the mainstream cryptocurrency, thereby causing Bitcoin to lose value or become worthless, which could adversely affect the sustainability of our business. - Bitcoin fails to gain wide market acceptance and fails to become a generally accepted medium of exchange in the global economy due to certain inherent limitations to cryptocurrencies.         - Over time, the reward for Bitcoin mining will decline in terms of the amount of Bitcoin awarded, which may reduce the incentive to mine Bitcoin. Specifically, a recent halving event occurred in May 2020, and Bitcoins are expected to be fully mined out by the year of 2140. Therefore, Bitcoin mining machines may become less productive as the available rewards for Bitcoin mining continue to decrease. If we cannot maintain the scale and profitability of the sales of our Bitcoin mining machines and, at the same time, successfully expand our business in other application markets, our business, results of operations, financial condition and prospects will suffer. Furthermore, excess inventory, inventory markdowns, brand image deterioration and margin squeeze caused by declining economic returns for miners or pricing competition for our Bitcoin mining machines could all have a material and adverse effect on our business, results of operations and financial condition. Further, while historically, China was a location of significant digital asset mining at low electric power rates, China's and other foreign countries' governments have taken action to prohibit or significantly restrict digital asset mining. For example, in May and June of 2021, in their efforts to curb digital asset trading and mining, regulators in several Chinese Provinces, including Qinghai, Inner Mongolia and Sichuan, announced policies to curb or ban local digital asset mining operations. Within a month following the ban announcement, the price of Bitcoin experienced a drop of over 30%. Additionally, in January 2022, the Central Bank of Russia called for a ban on cryptocurrency activities ranging from mining to trading. Whether or not the lack of mining activity domestically or internationally will negatively impact miner manufacturing and the development, price, availability of new and enhanced mining equipment is unknown. Should China or other countries that currently restrict digital asset mining eliminate such restrictions or actually seek to enhance such mining activity, or should other jurisdictions follow suit, the likely decrease in mining activity would likely reduce our revenue and profitability, and it is possible that our industry may not be able to withstand the sudden and extreme loss of mining power.

The IC design industry is characterized by rapid launches of new products, continuous technological advancements and changing market trends and customer preferences, all of which translate to a shorter life cycle and a decrease in the average selling prices of products over time. Because we compete in the environment of rapidly-evolving technology advancement and market trends and developments of the IC design industry, we cannot assume that we will be able to pass on any decrease in average selling prices of our products to our suppliers. If the average selling prices of our products unusually or significantly decrease and such decreases cannot be offset by a corresponding decrease in the prices of the principal components of our products, our gross profit margins may be materially and adversely affected, which in turn, may adversely affect our profitability.

The telecommunications industry has experienced and may continue to experience significant consolidation. The merger and expansion of participants will enable them to maximize their economies of scale to provide more competitive prices and invest a larger amount of resources into research and development. Our telecommunication products are primarily sold to major telecommunications service providers and institutional customers in China. Consolidation of our customers may mean that we could lose out in price and non-price competition and lead to a significant reduction of market share. As a result, our business and results of operations in the telecommunications market could be materially and adversely affected. We typically engage third-party agents to manage certain aspects of our business dealings with telecommunications products customers, and our business relationship with them may be adversely affected by any actual or perceived misconduct of our agents, over whom we have limited control. For example, in 2018, a local court in China convicted an employee of a major telecommunications products customer for taking bribes from a group of business partners, including our agents, and as a result, we have been blacklisted by such customer until the end of 2020. Although we are no longer blacklisted by such customer due to lapse of time, any future disruption of our business relationship with major telecommunications products customers could materially and adversely affect our business and results of operations.

Revenues from our telecommunications business were US$1.6 million, US$8.6 million and US$3.7 million, for the years ended December 31, 2020, 2021 and 2022, respectively. In December 2020, we sold all our equity ownership in Hangzhou Yiquansheng Communication Technology Co., Ltd., which provided technology services in the telecommunication sector and had incurred losses since its incorporation, to an affiliate controlled by Mr. Dong Hu, our chairman of the board of directors and Chief Executive Officer. Our telecommunications business will likely continue to be driven by the development of the communications industry in China, government policies, technological changes, user preference, and many other factors beyond our control. There is no guarantee that we will be able to maintain the competitiveness of our products or continue to operate our telecommunications business successfully as a key source of revenue. If we fail to grow our telecommunications business organically, we may suspend or cease such business line entirely.

The tape-out process is a critical milestone in our business. A successful tape-out means all the stages in the design and verification process of our ASIC chips have been completed, and the chip design is ready to be sent for manufacturing. The tape-out process requires considerable investment in time and resources and close cooperation with the wafer foundry, and repeated failures can significantly increase our costs, lengthen our product development period and delay our product launch. If the tape-out or testing of a new ASIC chip design fails, either as a result of design flaws by our research and development team or problems with production or the testing process by the wafer foundry, we may incur considerable costs and expenses to fix or restart the design process. Such obstacles may decrease our profitability or delay the launch of new products. Once tape-out is successful, the ASIC design is sent for manufacturing, and the final test yield is a measurement of the production success rate. The final test yield is a function of both product design, which is developed by us, and process technology, which typically belongs to a third-party foundry, such as Samsung and TSMC in our case. Low final test yields can result from a product design deficiency or a process technology failure or a combination of both. As such, we may not be able to identify problems causing low final test yields until our product designs go to the manufacturing stage, which may substantially increase our per unit costs and delay the launch of new products. For example, if either Samsung or TSMC experiences manufacturing inefficiencies or encounters disruptions, errors or difficulties during production, we may fail to achieve acceptable final test yields or experience product delivery delays. We cannot guarantee that Samsung and TSMC will be able to develop, obtain or successfully implement process technologies needed to manufacture future generations of our mining machines on a timely basis. Moreover, during the periods in which foundries are implementing new process technologies, their manufacturing facilities may not be fully productive. A substantial delay in the technology transitions to smaller geometry process technologies could have a material and adverse effect on us, particularly if our competitors transition to such technologies before us. In addition, resolution of yield problems requires cooperation among us, Samsung or TSMC, and packaging and testing partners. We cannot assure you that the cooperation will be successful and that any yield problem can be fixed.

A variety of front and back-end technical and development work is required to implement our wallet, custody, trading, staking and other solutions for our customers, and to integrate our supported digital assets with our existing technical infrastructure. For certain digital assets, a significant amount of development work is required and there is no guarantee that we will be able to successfully integrate any existing or future digital assets. In addition, such integration may introduce software errors or weaknesses into our platforms, including into our existing infrastructure. Even if such integration is initially successful, any number of technical changes, software upgrades, soft or hard forks, cybersecurity incidents, or other changes to the underlying blockchain network may occur from time to time, causing incompatibility, technical issues, disruptions, or security weaknesses to our platforms. If we are unable to identify, troubleshoot and resolve any such issues successfully, we may no longer be able to support such digital assets, our customers' assets may be frozen or lost, the security of our hot, warm, or cold wallets may be compromised, and our platforms and technical infrastructure may be affected, all of which could adversely impact our business.

Our ASIC chips are designed for proof-of-work, or POW, mechanism, which the Bitcoin network uses to validate Bitcoin transactions. Many within the Bitcoin community believe that POW is a foundation within Bitcoin's code that would not be changed. However, there have been debates on mechanism change to avoid the "de facto control" by a great majority of the network computing power. POW validation consumes large amounts of computing power and electricity. Proof-of-stake validation is a more recent development, which involves the validator losing part of its cryptocurrency holdings if it fails to correctly validate a block. While there are some drawbacks to proof-of-stake, it requires far less energy than proof-of-work. Cryptocurrencies whose transactions are validated on a proof-of-stake basis do not require miners. Future cryptocurrencies may utilize proof-of-stake rather than proof-of work, meaning that there will be less opportunity for miners to earn rewards. With the possibility of a change in rule or protocol of the Bitcoin network, if our Bitcoin mining machines cannot be modified to accommodate any such changes, our mining machines will not be able to meet customer demand, and the results of our operations will be significantly affected. For more details, see "Item 3. Key Information-D. Risk Factors-Risks Relating to Our Cryptocurrency, Blockchain and Mining Related Businesses-The administrators of the Bitcoin network's source code could propose amendments to the Bitcoin network's protocols and software that, if accepted and authorized by the Bitcoin network's community, could adversely affect our business, results of operations and financial condition" and "Item 3. Key Information-D. Risk Factors-Risks Relating to Our Cryptocurrency, Blockchain and Mining Related Businesses-The acceptance of Bitcoin network software patches or upgrades by a significant, but not overwhelming, percentage of the users and miners in the Bitcoin network could result in a "fork" in the blockchain, resulting in the operation of two separate networks that cannot be merged. The existence of forked blockchains could erode user confidence in Bitcoin and could adversely impact our business, results of operations and financial condition."

We use open source software and hardware in our Bitcoin mining machines. For example, our mining machine controller open source software needs to be installed on open source, which serves as the basic controller system for our mining machines, and we expect to continue to use open source software and hardware in the future. Open source software is generally freely accessible, usable and modifiable, and is made available to the general public on an "as-is" basis under the terms of a non-negotiable license. As a result, we may from time to time face claims from others claiming ownership of, or seeking to enforce the terms of, an open source license, including by demanding the release of the open source software, derivative works or our proprietary source code that was developed using such software. These claims could also result in litigation, requiring us to purchase a costly license or to devote additional research and development resources to change our technologies, either of which would have a negative effect on our business and operating results. In addition, if the license terms for the open source software we utilize change, we may be forced to re-engineer or discontinue our solutions or incur additional costs.

The Bitcoin network is based on a cryptographic, algorithmic protocol that governs the end-user-to-end-user interactions between computers connected to the Bitcoin network. A loosely organized group can propose amendments to the Bitcoin network's source code through one or more software upgrades that alter the protocols and software that govern the Bitcoin network and the properties of Bitcoin, including the irreversibility of transactions and limitations on the mining of new Bitcoin. To the extent a significant majority of the users and miners on the Bitcoin network accept and authorize such software upgrade(s), the Bitcoin network would be subject to new protocols and software that may render our mining machines less desirable, which in turn may adversely affect our business, results of operations and financial condition. If less than a significant majority of the users and miners on the Bitcoin network install any such software upgrade(s), the Bitcoin network could fork.