v3.26.3
Prepayment and other current assets (Details)
Jun. 30, 2026
CNY (¥)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
CNY (¥)
Prepayment and other current assets      
Prepaid expenses ¥ 8,071,162 $ 1,189,542 ¥ 11,937,161
Prepayments for intangible assets 25,070,945 3,695,000 43,352,840
Employee loans 1,874,808 276,313 2,729,457
Other project investment     1,683,616
Other receivables 3,007,897 443,309 1,937,493
Total ¥ 38,024,812 $ 5,604,164 ¥ 61,640,567