v3.26.1
Convertible notes payable (Details Narrative) - CNY (¥)
12 Months Ended
Dec. 31, 2025
Jun. 20, 2025
May 25, 2025
May 16, 2025
May 06, 2025
Convertible Notes Payable          
Aggregate principal amount     ¥ 10,000,000 ¥ 80,000,000 ¥ 36,000,000
Aggregate issue amount       ¥ 20,000,000 ¥ 2,880,000
Convertible note principal amount   ¥ 35,000,000      
Convertible notes payable   ¥ 32,200,000      
Coupon rate 0.00%        
Effective interest rate 8.70%        
Conversion of convertible notes payable ¥ 391,052