SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Value added taxes, Revenue recognition (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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| Revenue recognition | ||||
| Cost of revenues | ¥ 3,464,294,613 | $ 495,387,541 | ¥ 2,789,533,350 | ¥ 2,081,010,633 |
| Free service period | 1 year | 1 year | ||
| Transaction price allocated to remaining performance obligations | ¥ 281,062,668 | |||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | ||||
| Revenue recognition | ||||
| Transaction price allocated to remaining performance obligations | ¥ 257,746,493 | |||
| Period over which remaining performance obligation is expected to be recognized as revenue | 12 months | |||
| Shipping costs | ||||
| Revenue recognition | ||||
| Cost of revenues | ¥ 74,501,053 | ¥ 70,938,685 | ¥ 52,541,201 | |
| Minimum | ||||
| Revenue recognition | ||||
| Return and refund policy term (in days) | 7 days | 7 days | ||
| Maximum | ||||
| Revenue recognition | ||||
| Return and refund policy term (in days) | 30 days | 30 days | ||
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- Definition Free service period for mobile application services to customers, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Return-and-refund policy period in days for customers customers who purchase products online, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. No definition available.
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- References No definition available.
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- Definition The aggregate cost of goods produced and sold and services rendered during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, 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/disclosureRef
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