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Intangible Assets, Net (Tables)
12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible asset, net
   As of 
   December 31,
   December 31,
 
   2021   2022 
   RMB   RMB   US$ 
Software   1,438,174    1,438,175    206,498 
Less: accumulated depreciation   (517,266)   (680,216)   (97,668)
Intangible asset, net   920,908    757,959    108,830