Commitments and contingencies (Details) - CNY (¥) |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Commitments and contingencies | |||
| Restricted cash consists of bank deposits frozen by PRC local authorities | ¥ 22,046,995 | ¥ 20,179,754 | ¥ 68,859,138 |
| Contingent liability | ¥ 6,270,715 |
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- References No definition available.
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- Definition Amount of loss contingency liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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