[JOINT FILING AGREEMENT Dated: May 15, 2015 SEQUOIA CAPITAL 2010 CV HOLDCO, LTD. Kok Wai Yee Authorized Signatory SEQUOIA CAPITAL CHINA VENTURE 2010 FUND, L.P. SC China Venture 2010 Management, L.P. A Cayman Islands exempted limited partnership, Its General Partner SC China Holding Limited] [Execution Version SUBSCRIPTION AGREEMENT Agreement This Subscription Agreement (this “ (1) Company Tuniu Corporation, a company incorporated in the Cayman Islands (the “ (2) Purchaser Sequoia Capital 2010 CV Holdco, Ltd., a company organized under the laws of the Cayman Islands (the “ Party, Parties The Purchaser and the Company are sometimes each referred to herein as a “ W] [SCHEDULE 13D CUSIP No. 89977P106 Page 2 of 14 1. Names of reporting persons. I.R.S. Identification Nos. of above persons (entities only) Sequoia Capital 2010 CV Holdco, Ltd. IRS Identification No. 98-0660286 2. Check the appropriate box if a member of a group (see instructions) ¨ ¨ (a) 3. SEC use only 4. Source of funds (see instructions) OO 5.]