TOUR [Tuniu] SC 13D/A: DCM V, L.P. (“DCM V”) 2 CHECK THE
[DCM V, L.P. (“DCM V”) 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* ¨ x (a) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5 SOLE VOTING POWER American Depositary Shares (“ADSs”)) 22,881,096 Class A ordinary shares (“shares”) (represented by 7,627,032 6 SHARED]