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Short-Term Borrowings (Table)
12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Short-term Debt
    
As of December 31,
 
    
2020
    
2021
    
2021
 
    
RMB
    
RMB
    
US$
 
    
(in thousands)
 
Short-term bank loans
     449,649        630,000        98,861  
Reversed factoring arrangements
     784,873        2,491,046        390,899  
    
 
 
    
 
 
    
 
 
 
Total
  
 
1,234,522
 
  
 
3,121,046
 
  
 
489,760