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Long Term Deposits and Other Assets (Tables)
12 Months Ended
Dec. 31, 2023
Long Term Deposits and Other Assets [Abstract]  
Schedule of Long Term Deposits and Other Assets Long term deposits and other assets consist of the following:
   As of December 31, 
   2022   2023   2023 
   RMB   RMB   US$ 
Rent deposits   684    457    64 
Advertising deposits   269    269    38 
Long term deposits and other assets   953    726    102