COMMITMENTS AND CONTINGENCIES (Details)
12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
COMMITMENTS AND CONTINGENCIES        
Total rental expense under all operating leases $ 3,272,000 19,806,000 15,621,000 5,626,000
Future minimum lease payments under non-cancelable operating leases in relation to office premises        
2014 3,195,000 19,342,000    
2015 2,988,000 18,089,000    
2016 2,725,000 16,497,000    
2017 1,108,000 6,703,000    
Total 10,016,000 60,631,000    
Purchase Commitments        
Outstanding purchase commitments in relation to bandwidth $ 29,940,000 181,245,000