SHARE-BASED COMPENSATION (Details 4) (Options)
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Maximum
USD ($)
Dec. 31, 2012
Maximum
USD ($)
Dec. 31, 2011
Maximum
USD ($)
Jun. 20, 2011
Non-employees
USD ($)
Dec. 31, 2012
Non-employees
CNY
Dec. 31, 2013
Non-employees
USD ($)
Dec. 31, 2013
Non-employees
CNY
Dec. 31, 2013
ADS
Non-employees
USD ($)
Share-based compensation                      
Options granted (in shares) 9,471,008 2,130,000 25,954,666       1,100,000        
Exercise price (in dollars per share)       $ 0.41 $ 0.41 $ 0.41 $ 0.41        
Weighted average exercise price (in dollars per share)             $ 0.16        
Options to purchase ordinary shares, outstanding (in shares) 37,911,574             3,028,000      
Options to purchase ordinary shares, exercisable (in shares)               3,028,000      
Estimated fair value of options granted (in CNY or dollars)               1,615,000      
Closing price of ordinary shares (in dollars per share)                 $ 0.56   $ 8.91
Options outstanding with exercise price below the closing price of the entity's ordinary share (in shares)                 3,028,000 3,028,000  
Aggregate intrinsic value (in CNY or dollars per share)                 $ 1,237,000 7,487,000