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Accrued Expenses and Other Current Liabilities (Tables)
12 Months Ended
Dec. 31, 2023
Accrued Expenses and Other Current Liabilities [Abstract]  
Schedule of Accrued Expenses and Other Current Liabilities
   As of 
   December 31,   December 31, 
   2022   2023 
   RMB   RMB   US$ 
Accrued payroll and employee benefits   2,089,072    3,416,836    482,420 
Payable to third parties (a)   1,209,742    1,818,200    256,710 
Deposit payable   619,786    2,017,770    284,887 
Others   299,132    233,075    32,908 
Total   4,217,732    7,485,881    1,056,925 
(a)The balance mainly represents the payables for acquiring services for daily operations such as property fees, rent and utility bills as well as professional and consulting services as of December 31, 2022 and 2023.