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Short-term investments
 12 Months Ended
Dec. 31, 2024
Cash and Cash Equivalents [Abstract]  
Short-term investments

Note 6 — Short-term investments

 

Short-term investments consist of the following:

 

                 
    December 31,
2023		     December 31,
2024		     December 31,
2024		  
    RMB     RMB     USD  
Marketable securities     18,411,162       149,583,000       20,808,942  

 

Fair value disclosure:

 

          December 31, 2023  
    December 31,     Fair Value  
    2023     Level 1     Level 2     Level 3  
    RMB     RMB     RMB     RMB  
Marketable securities     18,411,162       18,411,162       -       -  

 

          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       -       -  

 

There is no transfer between the levels for the periods presented.

 

As of December 31, 2023 and 2024, short-term investments amounted to RMB 18,411,162 and RMB 149,583,000 (USD 20,808,942), respectively. During the year ended December 31, 2024, the Company invested a total of RMB 365,970,754 (USD 50,911,295) and the fair value change resulted in gain of approximately RMB 12,639,976 (USD 1,758,385).