SHARE-BASED COMPENSATION (Schedule of Share-Based Compensation Expense) (Details) (CNY)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense 63,338,088 29,948,523 21,922,364
Cost of services [Member]
     
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense 2,672,546 1,932,101 1,374,392
Service development [Member]
     
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense 19,563,206 11,459,551 7,625,962
Sales and marketing [Member]
     
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense 8,137,223 4,322,004 3,619,997
General and administrative [Member]
     
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense 32,965,113 12,234,867 9,302,013