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Intangible Assets, Net
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
INTANGIBLE ASSETS, NET
6.INTANGIBLE ASSETS, NET

 

Intangible asset, net consisted of the following:

 

   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 

 

Amortization expense was RMB124,686, RMB143,818 and RMB162,950 (US$23,397) for the years ended December 31, 2020, 2021 and 2022, respectively.