v3.25.2
Short-term investments (Details Narrative)
6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2025
CNY (¥)
Jun. 30, 2025
CNY (¥)
Dec. 31, 2024
CNY (¥)
Short-term Investments        
Short term investments $ 66,060,012   ¥ 472,897,200 ¥ 149,583,000
Invested in marketable securities 54,400,000 ¥ 389,427,840    
Profit on marketable securities $ 173,112 ¥ 1,239,240