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Land Use Rights, Net (Tables)
 12 Months Ended
Dec. 31, 2017
Text Block [Abstract]  
Land Use Rights

Land use rights held by the Company are amortized over the remaining term of the respective land use rights certificates.

 

     December 31,  
     2016      2017  
     RMB      RMB      US$  

Cost

      172,658        172,520        26,516  

Accumulated amortization

      (5,012 )       (8,849 )       (1,360 ) 
  

 

 

     

 

 

     

 

 

  

Land use rights, net

      167,646        163,671        25,156  
  

 

 

     

 

 

     

 

 

  
Carrying Value of Land Use Rights Pledged by Company to Secure Banking Borrowings

The carrying amounts of land use rights pledged by the Company to secure banking borrowings (Note 13) granted to the Company at the respective balance sheet dates were as follows:

 

     December 31,  
     2016      2017  
     RMB      RMB      US$  

Land use rights

      17,232        16,818        2,585