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Long Term Deposits and Other Assets (Tables)
 6 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of long term deposits and other assets
   As of
December 31,		   As of June 30, 
   2021   2022   2022 
   RMB   RMB   USD 
Rent deposits   418    940    140 
Advertising deposits   734    269    40 
Long term deposits and other assets   1,152    1,209    180