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Loan Payables (Tables)
6 Months Ended
Jun. 30, 2023
Loans Payables [Abstract]  
Schedule of Loan Payables Loan payables were as follows as of the respective balance sheet dates:
   December 31   June 30 
   2022   2023 
   RMB   RMB   US$ 
Loan payables, current portion   6,500    6,500    896 
Loan payables, non-current portion   
-
    
-
    
-
 
    6,500    6,500    896