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Deferred Revenue and Customer Deposits
 12 Months Ended
Dec. 31, 2022
Revenue Recognition and Deferred Revenue [Abstract]  
Deferred Revenue and Customer Deposits
11
Deferred revenue and customer deposits
Deferred revenue and customer deposits consist of the following:
 
     As of December 31,  
     2021      2022  
     RMB      RMB      US$  
Deferred revenue
      80,405        88,478        12,828  
Customer deposits
      39,586        50,326        7,297  
    
 
 
     
 
 
     
 
 
  
Total deferred revenue and customer deposits – current
      119,991        138,804        20,125  
    
 
 
     
 
 
     
 
 
  
Deferred
revenue
 -
non-current
      3,845        3,585        520  
    
 
 
     
 
 
     
 
 
  
Roll-forward of customer deposits:
 
     Year ended December 31,  
     2021      2022  
     RMB      RMB      US$  
Balance at beginning of year
      38,041        39,586        5,739  
Cash received from customers during the year
      225,976        111,877        16,221  
Revenue recognized during the year
      (220,333 )       (99,929 )       (14,488 ) 
Refunds paid during the year
      (4,098 )       (1,208 )       (175 ) 
    
 
 
     
 
 
     
 
 
  
Balance at end of the year
      39,586        50,326        7,297