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Related party transactions and balances (Tables)
12 Months Ended
Dec. 31, 2024
Related Party Transactions [Abstract]  
Schedule of related parties
                       
    December 31,
2023
    December 31,
2024
    December 31,
2024
 
    RMB     RMB     USD  
Amount due to Parent     17,379,013       -       -  
Amount due to a related party-Joyous JD     1,086,012       -       -