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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Schedule of future minimum payments under operating leases

Future minimum payments under non-cancelable operating leases consist of the following as of December 31, 2017:

 

     RMB      US$  

2018

     76,554        11,766  

2019

     67,495        10,374  

2020

     46,926        7,212  

2021

     20        3  

2022 and thereafter

     5        1  
  

 

 

    

 

 

 
     191,000        29,356