6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2023

Commission File Number: 001-36430

Tuniu Corporation

6, 8-12th Floor, Building 6-A, Juhuiyuan

No. 108 Xuanwudadao, Xuanwu District

Nanjing, Jiangsu Province 210023

People’s Republic of China

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x          Form 40-F ¨

Tuniu Announces Extension of its 2014 ShareIncentive Plan

The board of directors of Tuniu Corporation (the “Company”) and the compensation committee of the board of directors of the Company have recently approved and authorized an extension of the Company’s 2014 Share Incentive Plan (the “2014 Plan”) to amend the term of the 2014 Plan to twenty (20) years. The purpose of the 2014 Plan is to promote the success and enhance the value of the Company by linking the personal interests of the members of the board of directors, employees, and consultants to those of the Company’s shareholders and by providing such individuals with an incentive for outstanding performance to generate superior returns to the Company’s shareholders.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: November 27, 2023