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v3.25.1

Summary of Significant Accounting Policies (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Exchange rates | 7.1884 |  |  |  |  |  | 7.1884 |
Cash and cash equivalents | ¥ 32,431,081 |  | ¥ 48,164,664 |  |  |  | $ 4,511,585 |
Restricted cash | 418,722 |  | 417,990 |  |  |  | 58,250 |
Impairment of long-lived assets (in Dollars) | $ |  |  |  |  |  |  |  |
Allowance for sales (in Dollars) | $ |  |  |  |  |  |  |  |
Contract liabilities | 98,895,905 |  | 107,826,617 |  |  |  |  |
Revenue recognized | 9,765,766 |  | 23,740,945 |  | ¥ 804,875,532 |  |  |
Inventory write-down | 10,914,374 | $ 1,518,331 | 60,767,978 |  | 184,073,191 |  |  |
Advertising and promotion cost | 364,253 |  | 1,278,586 |  | 10,901,200 |  |  |
Shipping and handling costs | ¥ 968,713 |  | ¥ 2,122,358 |  | ¥ 4,233,084 |  |  |
Operating segment | 1 | 1 |  |  |  |  |  |

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