v3.25.2
Short-term investments (Tables)
6 Months Ended
Jun. 30, 2025
Short-term Investments  
Schedule of Short term investments
                 
    December 31,
2024
    June 30,
2025
    June 30,
2025
 
    RMB     RMB     USD  
Marketable securities     149,583,000       472,897,200       66,060,012  
Schedule of Fair value disclosure
                       
          December 31, 2024  
    December 31,     Fair Value  
    2024     Level 1     Level 2     Level 3  
    RMB     RMB     RMB     RMB  
Marketable securities     149,583,000       149,583,000       -       -  

 

          June 30, 2025  
    June 30,     Fair Value  
    2025     Level 1     Level 2     Level 3  
    RMB     RMB     RMB     RMB  
Marketable securities     472,897,200       472,897,200       -       -