v3.26.1
Related party balances and transactions (Details) - CNY (¥)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Related party balances and transactions          
Dividend receivable       ¥ 15,000,000 ¥ 15,000,000
Dividend received ¥ 15,000,000 ¥ 7,500,000      
Other Affiliate | Newup Bank of Liaoning          
Related party balances and transactions          
Net revenue     ¥ 11,370,044    
Account receivable and contract assets     ¥ 1,096,251