[AGREEMENT Dated: February 11, 2015 K2 Partners L.P. K2 Partners Its: General Partner Werkun Krzysztof, Director K2 Partners Werkun Krzysztof, Director EX-99.1 2 d870659dex991.htm EX-99.1] [1 Names of Reporting Persons K2 Partners L.P. 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 0 Shares 6 Shared Voting Power 10,354,952 Shares 7 Sole Dispositive Power]

[JOINT FILING AGREEMENT 0.00025 Xiaoping Xu Xiaoping Xu Success Origin Limited 2 EX-99.1 2 a15-4081_1ex99d1.htm EX-99.1] [1]

[13 G CUSIP No. 48138L107 Page 2 of 12 Pages 1 Name of reporting person SEQUOIA CAPITAL CHINA II, L.P. (“SCC II”) I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) 26-0204241 2 Check the appropriate box if a member of a group ¨ ¨ (a) 3 SEC use only 4 Citizenship or place of organization CAYMAN ISLANDS Number of shares]