Leases - Additional information (Details) |
12 Months Ended | ||||
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Dec. 31, 2025
CNY (¥)
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Dec. 31, 2025
USD ($)
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Dec. 31, 2024
CNY (¥)
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Dec. 31, 2023
CNY (¥)
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Dec. 31, 2025
USD ($)
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| Leases | |||||
| Lease costs under operating leases | ¥ 16,120,422 | $ 2,305,190 | ¥ 32,958,949 | ¥ 27,357,349 | |
| Weighted average discount rate | 3.99% | 3.82% | 3.99% | ||
| Weighted average remaining lease term | 12 months | 69 months | 12 months | ||
| Total lease payments | ¥ 5,115,280 | ¥ 76,368,441 | $ 731,475 | ||
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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