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 OF

THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2018

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Commission File Number: 001-36430

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Tuniu Corporation

Tuniu Building, No. 699-32

Xuanwudadao, Xuanwu District

Nanjing, Jiangsu Province 210042

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 ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):________________

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):________________

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: August 29, 2018

EXHIBIT INDEX

Exhibit 99.1 – Press Release

Exhibit 99.1

Tuniu Announces Unaudited Second Quarter 2018 Financial Results

Revenues from Packaged Tours in Q2 2018 Increased by 29.0% Year-Over-Year

Non-GAAP¹ Net Loss in Q2 2018 Decreased by 89.4% Year-Over-Year

NANJING, China, August 29, 2018 -- Tuniu Corporation (NASDAQ:TOUR) ("Tuniu" or the "Company"), a leading online leisure travel company in China, today announced its unaudited financial results for the second quarter ended June 30, 2018.

Highlights for the Second Quarter of 2018

Mr. Donald Dunde Yu, Tuniu’s founder, Chairman and Chief Executive Officer, said, “Tuniu continues to make improvements to its operations in order to create a company that is able to effectively capture the future of China’s leisure travel industry. With our company value of ‘customers first’ in mind, we continue to innovate technology and create products catered to our customer’s demand. During the quarter we continued to make strong strides in the development of our sales and service networks. Our sales network continues to help Tuniu expand the reach of our products to a greater audience while our service network allows us better serve our customers. Despite all the external factors affecting our operations today, we believe the long-term outlook of China’s leisure travel market remains positive.”

Ms. Maria Yi Xin, Tuniu’s Chief Financial Officer, said, “During the second quarter, we were able to continue narrowing our losses and achieve positive operating cash flow. Our core strategies of expanding our service and sales network are starting to translate into financial results as their contribution to our revenue starts to become increasingly meaningful. Going forward this year, we will continue to invest in the development of our sales and service network in order achieve higher economy of scale, and to maximize value for both our customers and our shareholders.”

¹ The section below entitled "About Non-GAAP Financial Measures" provides information about the use of Non-GAAP financial measures in this press release, and the table captioned “Reconciliations of GAAP and Non-GAAP Results" set forth at the end of this press release reconciles Non-GAAP financial information with the Company's financial results under GAAP.

² The conversion of Renminbi ("RMB") into United States dollars ("US$") is based on the exchange rate of US$1.00=RMB6.6171 on June 29, 2018 as set forth in H.10 statistical release of the U.S. Federal Reserve Board and available at https://www.federalreserve.gov/releases/h10/default.htm.

³ The 3 newly launched local tour operators in China are located in Tai’an, Qingdao and Qinhuangdao. The 1 newly launched local tour operator overseas is located in the U.S.

Second Quarter 2018 Results

Net revenues were RMB525.3 million (US$79.4 million) in the second quarter of 2018, representing a year-over-year increase of 14.2% from the corresponding period in 2017.

Cost of revenues was RMB274.5 million (US$41.5 million) in the second quarter of 2018, representing a year-over-year increase of 25.0% from the corresponding period in 2017. As a percentage of net revenues, cost of revenues was 52.3% in the second quarter of 2018 compared to 47.7% in the corresponding period in 2017.

Gross profit was RMB250.8 million (US$37.9 million) in the second quarter of 2018, representing a year-over-year increase of 4.2% from the corresponding period in 2017. The increase was primarily due to the increase in efficiency resulting from economies of scale.

Operating expenses were RMB371.9 million (US$56.2 million) in the second quarter of 2018, representing a year-over-year decrease of 29.7% from the corresponding period in 2017. Share-based compensation expenses and amortization of acquired intangible assets, which were allocated to operating expenses, were RMB60.0 million (US$9.1 million) in the second quarter of 2018. Non-GAAP operating expenses, which excluded share-based compensation expenses and amortization of acquired intangible assets, were RMB312.0 million (US$47.1 million) in the second quarter of 2018, representing a year-over-year decrease of 33.8%.

Loss from operations was RMB121.1million (US$18.3 million) in the second quarter of 2018, compared to a loss from operations of RMB288.6 million in the second quarter of 2017. Non-GAAP loss from operations, which excluded share-based compensation expenses and amortization of acquired intangible assets, was RMB60.9 million (US$9.2 million) in the second quarter of 2018.

Net loss was RMB82.8 million (US$12.5 million) in the second quarter of 2018, compared to a net loss of RMB270.8 million in the second quarter of 2017. Non-GAAP net loss, which excluded share-based compensation expenses and amortization of acquired intangible assets, was RMB22.6 million (US$3.4 million) in the second quarter of 2018.

Net loss attributable to ordinary shareholders was RMB79.6 million (US$12.0 million) in the second quarter of 2018, compared to a net loss attributable to ordinary shareholders of RMB270.6 million in the second quarter of 2017. Non-GAAP net loss attributable to ordinary shareholders, which excluded share-based compensation expenses and amortization of acquired intangible assets, was RMB19.4 million (US$2.9 million) in the second quarter of 2018.

As of June 30, 2018, the Company had cash and cash equivalents, restricted cash and short-term investments of RMB1.9 billion (US$288.2 million).

Business Outlook

For the third quarter of 2018, Tuniu expects to generate RMB725.5 million to RMB765.8 million of net revenues, which represents 5% to 10% decrease year-over-year. This forecast reflects Tuniu’s current and preliminary view on the industry and its operations, which is subject to change.

Conference Call Information

Tuniu’s management will hold an earnings conference call at 8:00 am U.S. Eastern Time, on August 29, 2018, (8:00 pm, Beijing/Hong Kong Time, on August 29, 2018) to discuss the second quarter 2018 financial results.

To participate in the conference call, please dial the following numbers:

Conference ID: Tuniu 2Q 2018 Earnings Call

A telephone replay will be available one hour after the end of the conference through September 6, 2018. The dial-in details are as follows:

Replay Access Code: 10123461

Additionally, a live and archived webcast of the conference call will also be available on the Company’s investor relations website at http://ir.tuniu.com.

About Tuniu

Tuniu (Nasdaq:TOUR) is a leading online leisure travel company in China that offers a large selection of packaged tours, including organized and self-guided tours, as well as travel-related services for leisure travelers through its website tuniu.com and mobile platform. Tuniu has over 2,000,000 stock keeping units (SKUs) of packaged tours, covering over 420 departing cities throughout China and all popular destinations worldwide. Tuniu provides one-stop leisure travel solutions and a compelling customer experience through its online platform and offline service network. For more information, please visit http://ir.tuniu.com.

Safe Harbor Statement

This press release contains forward-looking statements made under the "safe harbor" provisions of Section 21E of the Securities Exchange Act of 1934, as amended, and the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates," "confident" and similar statements. Tuniu may also make written or oral forward-looking statements in its reports filed with or furnished to the U.S. Securities and Exchange Commission, in its annual report to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Any statements that are not historical facts, including statements about Tuniu's beliefs and expectations, are forward-looking statements that involve factors, risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. Such factors and risks include, but are not limited to the following: Tuniu's goals and strategies; the growth of the online leisure travel market in China; the demand for Tuniu’s products and services; its relationships with customers and travel suppliers; the Company’s ability to offer competitive travel products and services; Tuniu’s future business development, results of operations and financial condition; competition in the online travel industry in China; relevant government policies and regulations relating to the Company’s structure, business and industry; and the general economic and business condition in China and elsewhere. Further information regarding these and other risks, uncertainties or factors is included in the Company's filings with the U.S. Securities and Exchange Commission. All information provided in this press release is current as of the date of the press release, and Tuniu does not undertake any obligation to update such information, except as required under applicable law.

About Non-GAAP Financial Measures

To supplement the Company's unaudited consolidated financial results presented in accordance with United States Generally Accepted Accounting Principles (“GAAP”), the Company has provided non-GAAP information related to cost of revenues, research and product development expenses, sales and marketing expenses, general and administrative expenses, operating expenses, loss from operations, net loss, net loss attributable to ordinary shareholders, net loss per ordinary share attributable to ordinary shareholders-basic and diluted and net loss per ADS, which excludes share-based compensation expenses and amortization of acquired intangible assets. We believe that the non-GAAP financial measures used in this press release are useful for understanding and assessing underlying business performance and operating trends, and management and investors benefit from referring to these non-GAAP financial measures in assessing our financial performance and when planning and forecasting future periods. For more information on these non-GAAP financial measures, please see the table captioned "Reconciliations of GAAP and non-GAAP Results" set forth at the end of this press release.

A limitation of using non-GAAP financial measures excluding share-based compensation expenses and amortization of acquired intangible assets is that share-based compensation expenses and amortization of acquired intangible assets have been – and will continue to be – significant recurring expenses in the Company's business. You should not view non-GAAP results on a stand-alone basis or as a substitute for results under GAAP, or as being comparable to results reported or forecasted by other companies.

For investor and media inquiries, please contact:

China

Mary Chen

Investor Relations Director

Tuniu Corporation

Phone: +86-25-6960-9988

E-mail: ir@tuniu.com

(Financial Tables Follow)