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Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2013
Receivables [Abstract]  
Schedule of Accounts Receivable
     As of December 31,  
     2012     2013     2013  
     RMB     RMB     US$  
     (In thousands)  

Accounts receivable

     1,259,251        2,264,660        374,095   

Allowance for doubtful accounts

     (5,768     (43,814     (7,237
  

 

 

   

 

 

   

 

 

 
     1,253,483        2,220,846        366,858   
  

 

 

   

 

 

   

 

 

 
Movements in Allowance for Doubtful Accounts Balance

The movements in the allowance for doubtful accounts were as follows:

 

     2011      2012     2013      2013  
     RMB      RMB     RMB      US$  
     (In thousands)  

Balance as of January 1

     2,223         5,806        5,768         953   

Amounts charged to (credited against) costs and expenses

     3,583         (38     38,046         6,284   
  

 

 

    

 

 

   

 

 

    

 

 

 

Balance as of December 31

     5,806         5,768        43,814         7,237