途牛 2026年年度报告和过渡报告

FORM20-F ☐TRANSITION REPORT PURSUANT TO SECTION13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☐SHELL COMPANY REPORT PURSUANT TO SECTION13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report......................... For the transition period fromtoCommission file number: 001-36430 Tuniu Corporation(Exact name of Registrant as specified in its charter)N/A(Translation of Registrant’s name into English)Cayman Islands(Jurisdiction of incorporation or organization)6, 8-12th floor, building 6-A, JuhuiyuanNO. 108 Xuanwudadao, Xuanwu DistrictNanjing, Jiangsu Province 210023The People’s Republic of China(Address of principal executive offices)Mr.Anqiang Chen, Financial ControllerTelephone: +(86) 25 86853969Email: ir@tuniu.com6, 8-12thfloor, building 6-A, JuhuiyuanNO. 108 Xuanwudadao, Xuanwu DistrictNanjing, Jiangsu Province 210023The People’s Republic of China(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person) Securities registered or to be registered pursuant to Section12(b)of the Act. *Not for trading, but only in connection with the listing on The Nasdaq Global Market of American depositary shares. Securities registered or to be registered pursuant to Section12(g)of the Act. None(Title of Class) Securities for which there is a reporting obligation pursuant to Section15(d)of the Act. None(Title of Class) Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by theannual report. Table of Contents 310,254,981 ClassA ordinary shares(excluding 17,697,861 Class A ordinary shares, represented by 5,899,287 ADSs, reserved for the futureexercise of options or the vesting of other awards under the 2008 Plan and the 2014 Plan)and 17,373,500 ClassB ordinary shares, par valueUS$0.0001 per share, as of December 31, 2025. Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule405 of the Securities Act. ☐Yes☒No If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section13 or 15(d)ofthe Securities Exchange Act of 1934.☐Yes☒No Indicate by check mark whether the registrant: (1)has filed all reports required to be filed by Section13 or 15(d)of the Securities Exchange Act of1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to suchfiling requirements for the past 90days.☒Yes☐No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405of Regulation S-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the registrant was required to submitsuch files).☒Yes☐No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growthcompany. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule12b-2 of the Exchange Act. Large accelerated filer Non-accelerated filer If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant haselected not to use the extended transition period for complying with any new or revised financial accounting standards †provided pursuant toSection13(a)of the Exchange Act.☐ †The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to itsAccounting Standards Codification after April5, 2012. Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internalcontrol over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm thatprepared or issued its audit report.☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included inthe filing reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensationreceived by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing: International Financial Reporting Standards as issued by the International AccountingStandards Board☐ If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to☐Item17☐Item18 If th