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Prepaid Expenses and Other Current Assets
 12 Months Ended
Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid Expenses and Other Current Assets
6. PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other current assets consist of the following:

 

       December 31,  
       2015        2016  
       RMB        RMB        US$  

Prepayments

        272,859          317,262          45,695  

Rental deposits

        10,051          1,494          215  

Interest receivable

        9,944          11,690          1,684  

Staff advances

        6,529          7,712          1,111  

Receivables from third-party payment platform

        4,598          12,327          1,775  

Other receivables

        34,696          26,734          3,851  
    

 

 

       

 

 

       

 

 

  
       338,677          377,219          54,331  
    

 

 

       

 

 

       

 

 

  

Prepayments primarily include prepaid purchase cost for new vehicles, prepaid VAT and surcharges and prepaid service fee. As of December 31, 2015 and 2016, prepaid purchase cost for new vehicles were RMB191,341 and RMB226,419 (US$32,611), respectively.