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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2023
Property and Equipment, Net [Abstract]  
Schedule of Property and Equipment, Net Property and equipment, net consisted of the following:
   As of 
   December 31,   December 31, 
   2022   2023 
   RMB   RMB   US$ 
Motor vehicles   1,538,213    1,485,841    209,785 
Electronic equipment   1,783,988    2,033,203    287,066 
Machinery   1,119,594    1,139,270    160,853 
Other equipment   1,041,034    1,413,753    199,607 
Construction in progress   
-
    655,987    92,617 
Subtotal   5,482,829    6,728,054    949,928 
Less: accumulated depreciation   (2,869,565)   (3,200,069)   (451,815)
    2,613,264    3,527,985    498,113 
Less: impairment charges   
-
    (2,404,009)   (339,420)
Property and equipment, net   2,613,264    1,123,976    158,693