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Business combination (Tables)
12 Months Ended
Dec. 31, 2024
Younike [Member]  
Business Acquisition [Line Items]  
Schedule of recognized identified assets acquired and liabilities assumed
               
    Fair value     Fair value  
    RMB     USD  
Cash     21,936       3,149  
Other current assets     4,821,002       692,215  
Current liabilities     (4,842,938 )     (695,364 )
Total consideration     -       -