Gaotu Techedu (GOTU) Risk Factors

On March 15, 2019, the National People's Congress promulgated the Foreign Investment Law, which came into effect on January 1, 2020 and replaced the trio of existing laws regulating foreign investment in China, namely, the Sino-foreign Equity Joint Venture Enterprise Law, the Sino-foreign Cooperative Joint Venture Enterprise Law and the Wholly Foreign-invested Enterprise Law, together with their implementation rules and ancillary regulations. The Foreign Investment Law embodies an expected PRC regulatory trend to rationalize its foreign investment regulatory regime in line with prevailing international practice and the legislative efforts to unify the corporate legal requirements for both foreign and domestic investments. However, since it is relatively new, uncertainties still exist in relation to its interpretation and implementation, and failure to take timely and appropriate measures to cope with the regulatory-compliance challenges could result in material and adverse effect on us. For instance, though the Foreign Investment Law does not explicitly classify contractual arrangements as a form of foreign investment, it contains a catch-all provision under the definition of "foreign investment", which includes investments made by foreign investors in China through means stipulated in laws or administrative regulations or other methods prescribed by the State Council. Therefore, it still leaves leeway for future laws, administrative regulations or provisions promulgated by the State Council to provide for contractual arrangements as a form of foreign investment, at which time it will be uncertain whether our contractual arrangements will be deemed to be in violation of the market access requirements for foreign investment in the PRC and if yes, how our contractual arrangements should be dealt with. In addition, if future laws, administrative regulations or provisions prescribed by the State Council mandate further actions to be taken by companies with respect to existing contractual arrangements, we may face substantial uncertainties as to whether we can complete such actions in a timely manner, or at all. In the worst-case scenario, we may be required to unwind our existing contractual arrangements and/or dispose of the relevant business operations, which could have a material and adverse effect on our current corporate structure, corporate governance, business, financial condition and results of operations.

The PRC legal system is based on written statutes and court decisions have limited precedential value. The PRC legal system is evolving rapidly, and the interpretations of many laws, regulations and rules may contain inconsistencies and enforcement of these laws, regulations and rules involves uncertainties. From time to time, we may have to resort to administrative and court proceedings to enforce our legal rights. However, since PRC judicial and administrative authorities have significant discretion in interpreting and implementing statutory and contractual terms, it may be more difficult to predict the outcome of a judicial or administrative proceeding than in more developed legal systems. Furthermore, the PRC legal system is based, in part, on government policies and internal rules, some of which are not published in a timely manner, or at all, but which may have retroactive effect. As a result, we may not always be aware of any potential violation of these policies and rules. Such unpredictability towards our contractual, property (including intellectual property) and procedural rights could adversely affect our business and impede our ability to continue our operations.

Pursuant to SAFE Circular 37, PRC residents who participate in share incentive plans in overseas non-publicly-listed companies due to their position as director, senior management or employees of the PRC subsidiaries of the overseas companies may submit applications to SAFE or its local branches for the foreign exchange registration with respect to offshore special purpose companies. Our directors, executive officers and other employees who are PRC residents and who have been granted share-based awards may follow SAFE Circular 37 to apply for the foreign exchange registration before our company becomes an overseas listed company. In February 2012, SAFE promulgated the Notices on Issues Concerning the Foreign Exchange Administration for Domestic Individuals Participating in Stock Incentive Plans of Overseas Publicly-Listed Companies, or SAFE Circular 7. Under SAFE Circular 7 and other relevant rules and regulations, PRC residents who participate in stock incentive plan in an overseas publicly-listed company are required to register with SAFE or its local branches and complete certain other procedures. Participants of a stock incentive plan who are PRC residents must retain a qualified PRC agent, which could be a PRC subsidiary of such overseas publicly listed company or another qualified institution selected by such PRC subsidiary, to conduct the SAFE registration and other procedures with respect to the stock incentive plan on behalf of its participants. Such participants must also retain an overseas entrusted institution to handle matters in connection with their exercise of share-based awards, the purchase and sale of corresponding shares or interests and fund transfers. In addition, the PRC agent is required to amend the SAFE registration with respect to the stock incentive plan if there is any material change to the stock incentive plan, the PRC agent or the overseas entrusted institution or other material changes. We and our PRC employees who have been granted share-based awards are subject to SAFE Circular 7 and other relevant rules and regulations. Failure of our PRC share-based award holders to complete their SAFE registrations may subject these PRC residents to fines and legal sanctions and may also limit our ability to contribute additional capital into our PRC subsidiary, limit our PRC subsidiary's ability to distribute dividends to us, or otherwise materially adversely affect our business.

The SAFE promulgated the Circular on Relevant Issues Relating to Domestic Resident's Investment and Financing and Roundtrip Investment through Special Purpose Vehicles, or SAFE Circular 37, in July 2014 that requires PRC residents or entities to register with SAFE or its local branch in connection with their establishment or control of an offshore entity established for the purpose of overseas investment or financing with such PRC residents or entities' legally owned assets or equity interests in domestic enterprises or offshore assets or interests. On February 13, 2015, SAFE issued SAFE Circular No. 13, which took effect on June 1, 2015, pursuant to which, the power to accept SAFE registration was delegated from local SAFE to local qualified banks where the assets or interest in the domestic entity was located. In addition, such PRC residents or entities must update their SAFE registrations when the offshore special purpose vehicle undergoes material events relating to any change of basic information (including change of such PRC citizens or residents, name and operation term), increases or decreases in investment amount, transfers or exchanges of shares, or mergers or divisions. SAFE Circular 37 is issued to replace the Notice on Relevant Issues Concerning Foreign Exchange Administration for PRC Residents Engaging in Financing and Roundtrip Investments via Overseas Special Purpose Vehicles, or SAFE Circular 75. If our shareholders who are PRC residents or entities do not complete their registration with the local SAFE branches, our PRC subsidiary may be prohibited from distributing its profits and proceeds from any reduction in capital, share transfer or liquidation to us, and we may be restricted in our ability to contribute additional capital to our PRC subsidiary. Moreover, failure to comply with the SAFE registration described above could result in liability under PRC laws for evasion of applicable foreign exchange restrictions. We have used our best 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 shareholders or beneficial owners of ours who are PRC residents or entities, including the beneficiaries of the trust schemes directly or indirectly holding interests in our Cayman Islands holding company, 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 subsidiary, could subject us to fines or legal sanctions, restrict our overseas or cross-border investment activities, limit our PRC subsidiary's ability to make distributions or pay dividends to us or affect our ownership structure, which could adversely affect our business and prospects.

We are an offshore holding company conducting our operations in China through our PRC subsidiary, our consolidated variable entity and its subsidiaries. We may make loans to our PRC subsidiary, consolidated variable entity and its subsidiaries, or we may make additional capital contributions to our PRC subsidiary, or we may establish new PRC subsidiaries and make capital contributions to these new PRC subsidiaries, or we may acquire offshore entities with business operations in China in an offshore transaction. Most of these ways are subject to PRC regulations and approvals. For example, loans by us to our wholly owned PRC subsidiary to finance its activities cannot exceed statutory limits and must be registered with the local counterpart of SAFE. If we decide to finance our wholly owned PRC subsidiary by means of capital contributions, these capital contributions are subject to the requirement of making necessary filings in the Foreign Investment Comprehensive Management Information System and registration with other governmental authorities in China. Due to the restrictions imposed on loans in foreign currencies extended to PRC domestic companies, we are not likely to make such loans to our consolidated variable interest entity, which is a PRC domestic company. Further, we are not likely to finance the activities of our consolidated variable interest entity by means of capital contributions due to regulatory restrictions relating to foreign investment in PRC domestic enterprises engaged in value-added telecommunication services and certain other businesses. SAFE promulgated the Notice of the State Administration of Foreign Exchange on Reforming the Administration of Foreign Exchange Settlement of Capital of Foreign-invested Enterprises, or SAFE Circular 19, effective June 2015, in replacement of the Circular on the Relevant Operating Issues Concerning the Improvement of the Administration of the Payment and Settlement of Foreign Currency Capital of Foreign-Invested Enterprises, the Notice from the State Administration of Foreign Exchange on Relevant Issues Concerning Strengthening the Administration of Foreign Exchange Businesses, and the Circular on Further Clarification and Regulation of the Issues Concerning the Administration of Certain Capital Account Foreign Exchange Businesses. According to SAFE Circular 19, the flow and use of the RMB capital converted from foreign currency-denominated registered capital of a foreign-invested company is regulated such that RMB capital may not be used for the issuance of RMB entrusted loans, the repayment of inter-enterprise loans or the repayment of banks loans that have been transferred to a third-party. Although SAFE Circular 19 allows RMB capital converted from foreign currency-denominated registered capital of a foreign-invested enterprise to be used for equity investments within China, it also reiterates the principle that RMB converted from the foreign currency-denominated capital of a foreign-invested company may not be directly or indirectly used for purposes beyond its business scope. Thus, it is unclear whether SAFE will permit such capital to be used for equity investments in China in actual practice. SAFE promulgated the Notice of the State Administration of Foreign Exchange on Reforming and Standardizing the Foreign Exchange Settlement Management Policy of Capital Account, or SAFE Circular 16, effective on June 9, 2016, which reiterates some of the rules set forth in SAFE Circular 19, but changes the prohibition against using RMB capital converted from foreign currency-denominated registered capital of a foreign-invested company to issue RMB entrusted loans to a prohibition against using such capital to issue loans to non-associated enterprises. Violations of SAFE Circular 19 and SAFE Circular 16 could result in administrative penalties. SAFE Circular 19 and SAFE Circular 16 may significantly limit our ability to transfer any foreign currency we hold, including the net proceeds from our initial public offering, to our PRC subsidiary, which may adversely affect our liquidity and our ability to fund and expand our business in China. On October 23, 2019, the SAFE promulgated the Notice for Further Advancing the Facilitation of Cross-border Trade and Investment, or the SAFE Circular 28, which, among other things, allows all foreign-invested companies to use Renminbi converted from foreign currency-denominated capital for equity investments in China, as long as the equity investment is genuine, does not violate applicable laws, and complies with the negative list on foreign investment. However, since the SAFE Circular 28 is newly promulgated, it is unclear how SAFE and competent banks will carry this out in practice. In light of the various requirements imposed by PRC regulations on loans to and direct investment in PRC entities by offshore holding companies, we cannot assure you that we will be able to complete the necessary government registrations or obtain the necessary government approvals on a timely basis, if at all, with respect to future loans by us to our PRC subsidiary or with respect to future capital contributions by us to our PRC subsidiary. If we fail to complete such registrations or obtain such approvals, our ability to use the proceeds we received from our initial public offering and to capitalize or otherwise fund our PRC operations may be negatively affected, which could materially and adversely affect our liquidity and our ability to fund and expand our business.

The Regulations on Mergers and Acquisitions of Domestic Companies by Foreign Investors, or the M&A Rules, adopted by six PRC regulatory agencies in 2006 and amended in 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 the Ministry of Commerce, or the MOC, be notified 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 MOC shall be notified in advance of any concentration of undertaking if certain thresholds are triggered. In addition, the security review rules issued by the MOC 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 MOC, 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 MOC 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.

The internet industry and education industry in China are highly regulated by the PRC government. As an internet-based education service provider, we are required to obtain and maintain all necessary approvals, licenses or permits applicable to our business operations and make all necessary registration and filings for our education services in China, and we may be required to apply for and obtain additional licenses or permits for our operations as the interpretation and implementation of current PRC laws and regulations are still evolving, and new laws and regulations may also be promulgated. Our VIE, Beijing BaiJiaHuLian and its wholly-owned subsidiary, Shanghai Jinyou Education Technology Co., Ltd., each currently holds a Value-added Telecommunications Business Operating License for internet information service and our VIE, Beijing BaiJiaHuLian currently holds an Internet Cultural Business Operating License and a Permit for Production and Operation of Radio and TV Programs. We may be required to apply for and obtain additional licenses, permits or recordation, given the significant uncertainties of the interpretation and implementation of certain regulatory requirements applicable to online education business. As of the date of this annual report, online education institutions are not explicitly required to obtain the License for Online Transmission of Audio-Visual Programs primarily because there are no implementation rules, explicit interpretation from government authorities or prevailing enforcement practice deeming internet education services as "internet audio-visual program" as defined in relevant rules and regulations promulgated by relevant government authorities. In addition, as of the date of this annual report, there are no implementation rules, explicit interpretation from government authorities or prevailing enforcement practice deeming the provision of our educational content to our students through our online platform as "online publishing" which requires an Online Publishing Service Permit. See "Item 4. Information on the Company-B. Business Overview-Government Regulations." However, there is no assurance that local PRC authorities will not adopt different enforcement practice, or any PRC government will not issue more explicit interpretation and rules or promulgate new laws and regulations from time to time to further regulate the online education industry, which may subject us to additional licensing requirements to continue to operate our business. We also print and provide physical education materials to our students. If the government authorities deem such activities as "publication distribution" under Administrative Provisions on the Publications Market, we may be required to obtain the Publication Operation License and failure to obtain such license may subject us to fines and we may be ordered by the competent government authorities to suspend printing and providing such offline educational materials to our students, which will materially and adversely affect our business operation. See "Item 4. Information on the Company-B. Business Overview-Government Regulations-Regulation Related to Publication Distribution." As of the date of this annual report, no material fines or other penalties have been imposed on us for failure to obtain such additional licenses, permits or recordation, including, among other things, License for Online Transmission of Audio-Visual Programs, Online Publishing Services Permit and Publication Operation License. There can be no assurance that once required, we will be able to obtain all the required approvals, licenses, permits and complete all necessary filings, record renewals and registrations on a timely basis for our online education services, given the significant amount of discretion the PRC authorities may have in interpreting, implementing and enforcing relevant rules and regulations, as well as other factors beyond our control and anticipation. If we fail to obtain required permits in a timely manner or obtain or renew any permits and certificates, or fail to complete the necessary filings, record renewals or registrations on a timely basis, we may be subject to fines, confiscation of the gains derived from our non-compliant operations, suspension of our non-compliant operations or claims for compensation of any economic loss suffered by our students or other relevant parties.

The private education industry in the PRC is subject to regulations in various aspects. Relevant rules and regulations are relatively new and evolving and could be changed to accommodate the development of the education, in particular, the online private education, markets from time to time. In August 2018, the Ministry of Justice, or MOJ, published the draft amendment to the Regulations on the Implementation of the Law for Promoting Private Education of the PRC, or MOJ Draft, for public comment. According to the MOJ Draft, we must file with the department of education at the provincial level, as we provide online non-diploma-awarding education services. See "Item 4. Information on the Company-B. Business Overview-Government Regulations-The Law for Promoting Private Education and its Implementing Rules." As of the date of this annual report, the MOJ Draft is still pending for final approval and has not come into effect. It remains uncertain when and how the MOJ Draft would come into effect, and whether and how local governments would promulgate rules related to the filing or licensing requirement applicable to online education service providers like us. If we are not able to comply with the filing or licensing requirement in a timely manner or at all, we may be subject to fines, confiscation of the gains derived from our non-compliant operations, suspension of our non-compliant operations or claims for compensation of any economic loss suffered by our students or other relevant parties. Further, the Ministry of Education, or the MOE, jointly with certain other PRC government authorities, promulgated the Implementation Opinions on Regulating Online After-School Training, or the Online After-School Training Opinions, effective on July 12, 2019. The Online After-School Training Opinions are intended to regulate academic after-school training involving internet technology provided to students in primary and secondary schools. Among other things, the Online After-School Training Opinions require that online after-school training institutions shall file with the competent provincial education regulatory authorities before October 31, 2019 and that such education regulatory authorities and other provincial government authorities shall jointly review these filings and the qualifications of the institutions making these filings. The Online After-School Training Opinions also impose a number of new regulations requiring, among other things, that (i) each class shall not last longer than 40 minutes and shall be taken at intervals of not less than 10 minutes; (ii) live streaming courses provided to students receiving compulsory education shall not end later than 9:00 p.m.; (iii) fees shall not be collected in a lump sum for more than 60 classes when charged based on the number of classes, or for a course length of more than three months when charged based on the length of the course; and (iv) instructors are required to obtain the necessary teaching qualification licenses. According to the Online After-School Training Opinions, provincial education regulatory authorities shall promulgate local implementing rules regarding these filing requirements. On September 29, 2019, the education regulatory authority in Beijing promulgated the Trial Implementation Rules on Filings of Beijing Online After-School Training, or the Beijing Online After-School Training Implementation Rules. The Beijing Online After-School Training Implementation Rules are applicable to training institutions that are registered in Beijing or complete ICP filings with the competent authorities in Beijing and provide online academic after-school training to students in primary and secondary schools. Pursuant to the Beijing Online After-School Training Implementation Rules, online after-school training institutions shall submit filings for providing online after-school training services via an online national platform for online after-school administration services before October 31, 2019, and the education regulatory authorities in Beijing and other government authorities shall jointly complete review of such filings before December 31, 2019. See "Item 4. Information on the Company-B. Business Overview-Government Regulations-Regulation Related to Private Education-Regulation Related to After-School Tutoring." We have made the filings in accordance with the Online After-School Training Opinions and the Beijing Online After-School Training Implementation Rules. However, as of the date of this annual report, relevant education regulatory authorities have not completed the review of our filings. As of the date of this annual report, 66% of our K-12 instructors have obtained teaching qualification licenses, and 16% have passed the teaching qualification exam, which is the prerequisite for obtaining teaching qualification license. As of the date of this annual report, we have not received any written warning or been subject to any penalties from the relevant government authorities regarding our possible failure to comply with the relevant circulars, opinions or implementation rules. We have notified our K-12 instructors of the requirement to obtain the teaching qualification licenses. It is uncertain, however, whether and how PRC government authorities would further promulgate new laws and regulations applying the requirements under these circulars, opinions or implementation rules to online training institutions like us. There is no assurance that we can comply with any newly promulgated laws and regulations in a timely manner or at all, and any failure to comply may materially and adversely affect our business, financial condition and results of operations. Given the foregoing, the interpretation and application of the existing laws and regulations and the newly promulgated implementation rules and interpretations, if any, that governs the online private education industry would create substantial uncertainties regarding the legality of our business operation, which create risks that we may be found to violate the existing laws and regulations and any newly promulgated implementation rules and interpretations.

Under applicable PRC laws and regulations, arrangements and transactions among related parties may be subject to audit or challenge by the PRC tax authorities. We could face material and adverse tax consequences if the PRC tax authorities determine that the contractual arrangements in relation to our VIE, our consolidated variable interest entity, were not entered into on an arm's length basis in such a way as to result in an impermissible reduction in taxes under applicable PRC laws, rules and regulations, and adjust income of our VIE in the form of a transfer pricing adjustment. A transfer pricing adjustment could, among other things, result in a reduction of expense deductions recorded by our VIE for PRC tax purposes, which could in turn increase its tax liabilities without reducing our PRC subsidiary's tax expenses. In addition, the PRC tax authorities may impose late payment fees and other penalties on our VIE for the adjusted but unpaid taxes according to the applicable regulations. Our financial position could be materially and adversely affected if our VIE's tax liabilities increase or if it is required to pay late payment fees and other penalties.

Selling expenses represent a significant portion of our operating expenses. We incurred RMB75.3 million, RMB121.5 million and RMB1,040.9 million (US$149.5 million) in selling expenses in 2017, 2018 and 2019, respectively. Our sales and marketing activities may not be well received by students and may not result in the levels of sales that we anticipate and our trial courses may not be attractive to our prospective students. For example, if our students attending trial courses do not purchase our standard courses, our business and results of operations may be materially and adversely affected. Furthermore, we may not be able to maintain or further improve our operational efficiency. We also may not be able to retain or recruit experienced sales staff, or to efficiently train junior sales staff. In addition, marketing and branding approaches and tools in the online education market in China are evolving. This further requires us to enhance our marketing and branding approaches and experiment with new methods to keep pace with industry developments and student preferences. Failure to refine our existing marketing and branding approaches or to introduce new marketing and branding approaches in a cost-effective manner may reduce our market share, cause our revenues to decline and negatively impact our operating margins.

Our ability to continue to attract students to purchase our course packages and to increase their spending are critical to the continued success and growth of our business. This in turn will depend on several factors, including our ability to engage, train and retain high quality teaching staff, continue to develop, adapt or enhance quality of our course offerings to meet the evolving demands of our existing or prospective students, and effectively market our course offerings and enhance our brand awareness to a broader base of prospective students. We may not always be able to meet our students' expectations in terms of academic performance due to a variety of reasons, many of which are outside of our control. We may face student dissatisfaction due to our students' perceptions of our failure to help them achieve their anticipated academic goals, our students' overall dissatisfaction with the quality of our education content offerings and our teaching staff, as well as changing views of the value of the diplomas, degrees and qualifications they are pursuing through taking our courses. We must also manage our growth while maintaining consistent and high teaching quality, and respond effectively to competitive pressures. If we are unable to continue to attract students to purchase our course packages and to increase the spending of our students, our gross billings and net revenues may decline, which may have a material adverse effect on our business, financial condition and results of operations.

Sales of substantial amounts of the ADSs in the public market, or the perception that these sales could occur, could adversely affect the market price of the ADSs and could materially impair our ability to raise capital through equity offerings in the future. The ADSs sold in our initial public offering and follow-on offering are freely tradable without restriction or further registration under the Securities Act, and shares held by our existing shareholders may also be sold in the public market in the future subject to the restrictions in Rule 144 and Rule 701 under the Securities Act. We cannot predict what effect, if any, market sales of securities held by our significant shareholders or any other shareholder or the availability of these securities for future sale will have on the market price of the ADSs.

We believe that our copyrights, trademarks and other intellectual property are essential to our success. We have devoted considerable time and energy to the development and improvement of our websites, mobile apps, our system infrastructure and our course materials. We rely primarily on copyrights, trademarks, trade secrets and other contractual restrictions for the protection of the intellectual property used in our business. Nevertheless, these provide only limited protection and the actions we take to protect our intellectual property rights may not be adequate. Our trade secrets may become known or be independently discovered by our competitors. Third parties may in the future pirate our course materials and may infringe upon or misappropriate our other intellectual property. Infringement upon or the misappropriation of, our proprietary technologies or other intellectual property could have a material adverse effect on our business, financial condition or results of operations. Although we have taken measures to monitoring and policing the unauthorized use of our copyrighted course materials, policing the unauthorized use of intellectual property rights can be difficult and expensive. In addition, we and our instructors whom we have signed exclusive contracts with and engage in content development may be deemed to have joint ownership over intellectual properties relating to our course content. Our instructors may continue to use these course content if they resign with us and join our competitors, which may negatively impact the attractiveness of our courses to prospective students and parents. Although we have entered into agreements with certain instructors to prohibit them from using our course content without our prior consent, we cannot ensure compliance of instructors with such agreement. Also, litigation may be necessary to enforce our intellectual property rights, protect our trade secrets or determine the validity and scope of the proprietary rights of others. Such litigation may be costly and divert management's attention away from our business. An adverse determination in any such litigation would impair our intellectual property rights and may harm our business, prospects and reputation. The legal regime relating to the recognition and enforcement of intellectual property rights in China is particularly limited, and does not protect intellectual property rights to the same extent as federal and state laws in the United States. Legal proceedings to enforce our intellectual property in China may progress slowly, during which time infringement may continue largely unimpeded. Enforcement of judgments in China is uncertain, and even if we are successful in litigation, it may not provide us with an effective remedy. In addition, we have no insurance coverage against litigation costs and would have to bear all costs arising from such litigation to the extent we are unable to recover them from other parties. The occurrence of any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

We rely on certain top quality instructors to deliver our course offerings. We generated 46.6% and 36.3%, respectively, of our total net revenues from courses delivered by our top 10 instructors, ranked by net revenues generated from courses taught by each instructor in a given period, in 2018 and 2019. Our reliance on certain top quality instructors may expose us to concentration risks. If we lose our top quality instructors to competitors, the attractiveness of our course offerings may be adversely affected, which could have an adverse impact on our financial condition and results of operations.

We have adopted a dual-teacher system, comprised of high quality instructors and professional tutors. Our teaching staff is critical to the learning experience of our students and our reputation. We seek to engage high quality teaching staff with strong education background and teaching skills. We must provide competitive pay and offer attractive career development opportunities to attract and retain them. We must also provide ongoing training to our teaching staff to ensure that they stay abreast of changes in course materials, student demands and other changes and trends necessary to teach effectively. Furthermore, as we continue to develop new education content, we may need to engage additional high quality teaching staff with appropriate skill sets or backgrounds to deliver instructions effectively. We cannot guarantee that we will be able to effectively engage and train such teaching staff quickly, or at all. Furthermore, given other potential more attractive opportunities for our quality teaching staff, over time some of them may choose to leave us. Departure of quality teaching staff may reduce the attractiveness of our course offerings and negatively impact our paid course enrollments. Furthermore, in the event such quality teaching staff join our competitors, students may decide to follow such quality teaching staff and enroll in their courses offered through other online education companies, which may further weaken our competitive position in the industry. Although we have not experienced major difficulties in engaging, training or retaining high quality teaching staff in the past, we may not always be able to engage, train and retain enough high quality teaching staff to keep pace with our growth while maintaining consistent education quality. We may also face significant competition in engaging high quality teaching staff from our competitors or from other opportunities that are perceived as more desirable. A shortage of high quality teaching staff, a decrease in the quality of our teaching staff's performance, whether actual or perceived, or a significant increase in the cost to engage or retain high quality teaching staff would have a material adverse effect on our business, financial condition and results of operations.

The continued services of our senior management and other key personnel is important to our continued success. In particular, we rely on the expertise and experience of Mr. Larry Xiangdong Chen, our founder, chairman and CEO. We also rely on the experience and services from other senior management. If they cannot work together effectively or efficiently, our business may be severely disrupted. If one or more of our senior management were unable or unwilling to continue in their present positions, we might not be able to replace them easily or at all, and our business, financial condition and results of operations may be materially and adversely affected. If any of our senior management joins a competitor or forms a competing business, we may lose students, teaching staff, and other key professionals and staff members. Our senior management has entered into employment agreements with us which contain confidentiality clauses, as well as standalone confidentiality and non-compete agreements. However, if any dispute arises between our senior management and us, we may have to incur substantial costs and expenses in order to enforce such agreements in China or we may be unable to enforce them at all.