SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
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| Schedule of cash and cash equivalents |
| | | | | | | As of December 31, | | | 2024 | | 2025 | | | RMB | | RMB | Financial institutions in mainland China | | | | | —Denominated in RMB | | 229,710,326 | | 546,200,227 | —Denominated in USD | | 311,341,363 | | 216,499,485 | —Denominated in EUR | | 66,246,844 | | 103,125,928 | —Denominated in GBP | | 1,127,657 | | 1,286,142 | | | | | | Total cash and cash equivalents balances held at financial institutions in mainland China | | 608,426,190 | | 867,111,782 | | | | | | Financial institutions in the United States | | | | | —Denominated in USD | | 1,583,932 | | 497,269 | | | | | | Total cash balances held at financial institutions in the United States | | 1,583,932 | | 497,269 | | | | | | Financial institutions in Hong Kong S.A.R. | | | | | —Denominated in USD | | 9,328,332 | | 41,517,988 | —Denominated in HKD | | 45,736 | | 34,370 | —Denominated in EUR | | 5,674 | | 6,210 | | | | | | Total cash balances held at financial institutions in Hong Kong S.A.R. | | 9,379,742 | | 41,558,568 | | | | | | Total cash balances held at financial institutions in other locations | | 10,485,440 | | 15,382,246 | | | | | | Total cash and cash equivalents balances held at financial institutions | | 629,875,304 | | 924,549,865 |
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| Schedule of term deposits |
| | | | | | | As of December 31, | | | 2024 | | 2025 | | | RMB | | RMB | Financial institutions in mainland China | | | | | —Denominated in RMB | | 20,000,000 | | — | —Denominated in USD | | 254,351,895 | | 128,235,695 | | | | | | Total term deposits | | 274,351,895 | | 128,235,695 |
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| Schedule of cash and cash equivalents and restricted cash |
| | | | | | | As of December 31, | | | 2024 | | 2025 | | | RMB | | RMB | Cash and cash equivalents | | 630,021,303 | | 924,738,132 | Restricted cash | | 216,395,796 | | 210,864,000 | Total cash, cash equivalents and restricted cash | | 846,417,099 | | 1,135,602,132 |
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| Schedule of estimated useful lives of property and equipment |
| | | | | Estimated useful lives | Furniture | | 3 - 5 years | Machinery and equipment | | 3 - 10 years | Building | | 50 years | Office and electronic equipment | | 2 - 5 years | Leasehold improvements | | The shorter of the estimated useful life or remaining lease term | Motor vehicles | | 3 - 4 years |
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| Summary of concentration of customers and suppliers |
| | | | | | | | | | | | | | | | For the Year Ended December 31, | | | | 2023 | | 2024 | | 2025 | | | | RMB | | % | | RMB | | % | | RMB | | % | | Greater than 10% of the total revenue: | | | | | | | | | | | | | | Customer A | | 319,208,693 | | 12 | % | 527,366,534 | | 16 | % | 731,464,019 | | 17 | % |
| | | | | | | | | | | | | | | | For the Year Ended December 31, | | | | 2023 | | 2024 | | 2025 | | | | RMB | | % | | RMB | | % | | RMB | | % | | Greater than 10% of total purchase: | | | | | | | | | | | | | | Supplier Y | | 286,132,811 | | 16 | % | 322,251,970 | | 12 | % | * | | * | % |
*The amount was less than 10% of total purchase.
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