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Short-Term Borrowings (Tables)
12 Months Ended
Dec. 31, 2022
Short-Term Borrowings [Abstract]  
Schedule of short-term borrowings
   As of 
   December 31,
   December 31,
 
   2021   2022 
   RMB   RMB   US$ 
China Construction Bank Shenzhen Shangbu Branch (a)   7,900,000    
-
    
-
 
Industrial and Commercial Bank of China (b)   3,000,000    3,000,000    430,750 
Shenzhen Futian Yinzuo Rural Bank(c)   
-
    2,000,000    287,166 
Bank of China Shenzhen Dongbu Branch (d)   
-
    9,800,000    1,407,116 
Total   10,900,000    14,800,000    2,125,032