v3.26.1
Long-term investments (Tables)
6 Months Ended
Jun. 30, 2026
Debt Disclosure [Abstract]  
Schedule of Long-term investments
                       
    December 31,
2025
    June 30,
2026
    June 30,
2026
 
    RMB     RMB     USD  
          (Unaudited)     (Unaudited)  
5.0% Investment in a company in mobile games industry     600,000       600,000       88,094  
5.0% Investment in a company in central processing advertising algorithm services     600,000       600,000       88,094  
Subtotal     1,200,000       1,200,000       176,188  
Less: Impairment loss     1,103,089       1,103,089       161,959  
Total     96,911       96,911       14,229