Summary of significant accounting policies - Others (Details) |
12 Months Ended | ||||
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Dec. 31, 2025
CNY (¥)
segment
shares
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Dec. 31, 2025
USD ($)
segment
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Dec. 31, 2024
CNY (¥)
shares
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Dec. 31, 2023
CNY (¥)
|
Dec. 31, 2025
USD ($)
shares
|
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| Summary of significant accounting policies | |||||
| Deposit payable to channel cooperators | ¥ 12,016,415 | ¥ 12,016,415 | $ 1,718,324 | ||
| Defined contribution plan cost | 66,218,527 | $ 9,469,123 | 53,796,095 | ¥ 47,040,770 | |
| Advertising cost | ¥ 10,518,390 | $ 1,504,110 | 8,563,551 | 8,105,126 | |
| VAT rate (as a percent) | 6.00% | 6.00% | |||
| VAT | ¥ 568,723,190 | $ 81,326,335 | 401,550,251 | 301,613,913 | |
| Deferred tax asset increase | 543,516,681 | 266,462,248 | 77,721,853 | ||
| Net increase to the ACL | ¥ | 1,076,800,000 | ||||
| Gain (Loss) recognized | 147,887 | 21,148 | (313,815) | (6,852) | |
| Investment net of tax effect | 49,296 | 7,049 | 104,605 | 2,284 | |
| Other comprehensive income attributable to financial investments | 3,198,217 | 457,339 | 292,799 | 474,792 | |
| Investment net of tax effect | ¥ | 0 | 1,696,625 | 0 | ||
| Other comprehensive income (loss) reclassification | 767,591 | 109,764 | 4,259,490 | 0 | |
| Other comprehensive income (loss), reclassification net of tax effect | 255,864 | $ 36,588 | 1,440,761 | ¥ 0 | |
| Loans receivable, net | ¥ 5,298,631,388 | ¥ 4,828,316,995 | $ 757,694,211 | ||
| Translation into USD | 6.9931 | 6.9931 | |||
| Treasury stock, shares | shares | 94,600,042 | 78,439,504 | 94,600,042 | ||
| Number of operating segments | segment | 1 | 1 | |||
| Number of reportable segments | segment | 1 | 1 | |||
| Consolidated Trusts | |||||
| Summary of significant accounting policies | |||||
| VAT rate (as a percent) | 3.00% | 3.00% | |||
| ZhongAn | |||||
| Summary of significant accounting policies | |||||
| VAT rate (as a percent) | 13.00% | 13.00% | |||
| X | ||||||||||
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cost for defined contribution plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount, after tax, of other comprehensive income (loss) (OCI) for proportionate share of equity method investee's OCI. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) (OCI) for proportionate share of equity method investee's OCI. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. No definition available.
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| X | ||||||||||
- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Percentage of value added tax (VAT) rate. No definition available.
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- Details
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- Details
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