Banking borrowings (Details) |
Dec. 31, 2025
USD ($)
|
Dec. 31, 2025
CNY (¥)
|
Dec. 31, 2024
CNY (¥)
|
|---|---|---|---|
| Banking Borrowings | |||
| Banking borrowings-short-term | $ 4,268,154 | ¥ 30,000,000 | ¥ 15,000,000 |
| Total | $ 4,268,154 | ¥ 30,000,000 | ¥ 15,000,000 |