v3.25.2
Long-term investments (Tables)
6 Months Ended
Jun. 30, 2025
Debt Disclosure [Abstract]  
Schedule of Long-term investments
                       
    December 31,
2024
    June 30,
2025
    June 30,
2025
 
    RMB     RMB     USD  
          (Unaudited)     (Unaudited)  
5.0% Investment in a company in mobile games industry     600,000       600,000       83,815  
5.0% Investment in a company in central processing advertising algorithm services     600,000       600,000       83,815  
Subtotal     1,200,000       1,200,000       167,630  
Less: Impairment loss     1,102,938       1,102,938       154,072  
Total     97,062       97,062       13,559