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CONVERTIBLE NOTE (Tables)
12 Months Ended
Dec. 31, 2014
CONVERTIBLE NOTE [Abstract]  
Reconciliation of Derivative Redemption Feature Measured at Fair Value on Recurring Basis
Derivative
redemption
feature
RMB
 
Balance as of December 31, 2012 -  
Fair value of the derivative redemption feature on issuance date     22,355  
Change in fair value of the derivative redemption feature     26,809  
Settlement of the derivate redemption feature upon IPO     (49,164 )
         
Balance as of December 31, 2013     -