[Joint Filing Agreement SAIF Partners IV L.P. Andrew Y. Yan Director of SAIF IV GP Capital Ltd., which is the General Partner of SAIF IV GP, L.P., which is the General Partner of SAIF Partners IV L.P. SAIF IV GP, L.P. Andrew Y. Yan Director of SAIF IV GP Capital Ltd., which is the General Partner of SAIF IV GP,] [CUSIP No. P8696W104 Page 2 of 9 1 NAMES OF REPORTING PERSONS 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) o (a) þ (b) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands 5]