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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of future minimum lease payments under non-cancelable operating
   RMB   USD 
Twelve months ending December 31,        
2022   4,815    756 
2023   4,395    690 
2024   4,374    686 
2025   365    57 
Total   13,949    2,189