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Prepayments - Schedule of Prepayments (Details) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥)
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Schedule of Prepayments [Abstract] |  |  |
Prepayments – inventories and processing fee | ¥ 3,011,819 |  | ¥ 14,645,763
Prepayments – design fees |  |  | 7,162,700
Prepayments – others | 1,594,247 |  | 2,577,547
Total | ¥ 4,606,066 | $ 640,764 | ¥ 24,386,010

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