v3.26.1
Accounts receivable, net (Tables)
12 Months Ended
Dec. 31, 2025
Credit Loss [Abstract]  
Schedule of accounts receivable, net
                       
    December 31,
2024
    December 31,
2025
    December 31,
2025
 
    RMB     RMB     USD  
Accounts receivable     23,714,517       43,587,890       6,201,327  
Less: allowance of credit losses     -       -       -  
Accounts receivable, net     23,714,517       43,587,890       6,201,327  
Schedule of changes in allowance for doubtful accounts
                       
    December 31,
2024
    December 31,
2025
    December 31,
2025
 
    RMB     RMB     USD  
Beginning balance     3,951,391       -       -  
Addition     -       -       -  
Recovery     (3,951,391 )     -       -  
Ending balance     -       -       -