ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Movement of provision (Details) - CNY (¥) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Movement of provision | |||
| Accrued warranty-beginning of year | ¥ 29,293,848 | ¥ 25,325,839 | ¥ 33,812,290 |
| Additional provisions recognized | 45,999,122 | 27,645,757 | 21,565,131 |
| Warranty claims paid | (36,618,707) | (23,677,748) | (30,051,582) |
| Accrued warranty-end of year | ¥ 38,674,263 | ¥ 29,293,848 | ¥ 25,325,839 |