Short-term investments (Details) |
Jun. 30, 2026
USD ($)
|
Jun. 30, 2026
CNY (¥)
|
Dec. 31, 2025
CNY (¥)
|
|---|---|---|---|
| Short term Investments | $ 263,983,405 | ¥ 1,797,964,573 | ¥ 899,151,784 |
| Equity Securities And E T Fs [Member] | |||
| Short term Investments | 40,534,302 | 276,075,078 | 265,947,428 |
| Time Deposit [Member] | |||
| Short term Investments | 90,895,250 | 619,078,458 | |
| Currency Linked Structured Investment [Member] | |||
| Short term Investments | 70,000,000 | 476,763,000 | |
| Structured Financial Products [Member] | |||
| Short term Investments | $ 62,553,853 | ¥ 426,048,037 | ¥ 633,204,356 |