Financial investments (Details) |
12 Months Ended | |||||||
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Dec. 31, 2025
CNY (¥)
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Dec. 31, 2025
USD ($)
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Dec. 31, 2024
CNY (¥)
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Dec. 31, 2023
CNY (¥)
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Dec. 31, 2022
CNY (¥)
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Dec. 31, 2025
USD ($)
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Dec. 31, 2024
USD ($)
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Dec. 31, 2021
CNY (¥)
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| Financial investments | ||||||||
| Investments | ¥ 111,644,194 | ¥ 141,341,519 | $ 15,964,907 | |||||
| Contribution | ¥ 69,646,000 | |||||||
| Capital commitment return | 12,403,257 | $ 1,773,642 | ||||||
| Dividends | 6,596,079 | 943,227 | ||||||
| Impairment | 0 | 0 | ¥ 0 | |||||
| Upward adjustment | 0 | 0 | 0 | |||||
| Downward adjustment | 0 | 0 | 0 | |||||
| Cumulative impairment losses | 8,874,750 | 1,269,072 | ||||||
| Recognized unrealized gains | 17,133,677 | 6,497,518 | ||||||
| Recognized unrealized loss | 21,052,326 | 3,010,443 | ||||||
| Decrease of fair value | (21,052,326) | (3,010,443) | 17,133,677 | ¥ 6,497,518 | ||||
| Fixed term deposit in commercial bank | 10,000,000 | 1,429,981 | 5,000,000 | |||||
| Amortization of net of allowance for credit loss | 5,009,792 | 5,010,417 | 716,391 | $ 716,480 | ||||
| Redeemed amount | 10,062,632 | 1,438,937 | ||||||
| Interest income | 62,007 | $ 8,867 | 10,417 | |||||
| Dragonfly Ventures Feeder, L.P. | ||||||||
| Financial investments | ||||||||
| Investments | 95,789,583 | 114,164,666 | 13,697,728 | ¥ 63,726,000 | ||||
| IOSG Fund II LP | ||||||||
| Financial investments | ||||||||
| Investments | ¥ 15,854,611 | ¥ 27,176,853 | $ 2,267,179 | ¥ 19,117,800 | ||||
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cumulative impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash outflow through purchase of long-term held-to-maturity securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of return on capital commitment received on its investment in equity securities without readily determinable fair value. No definition available.
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| X | ||||||||||
- Definition Amount of equity securities without readily determinable fair value, contribution. No definition available.
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| X | ||||||||||
- Definition Amount received by the entity on its partial redemption and as dividend on its investment in equity securities without readily determinable fair value. No definition available.
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- Details
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- Details
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