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Prepayments (Details) - Schedule of Prepayments | Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥)
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Schedule of Prepayments [Abstract] |  |  |
Prepayments – inventories and processing fee | ¥ 14,645,763 |  | ¥ 64,813,532
Prepayments – design fees | 7,162,700 |  | 3,850,329
Prepayments – others | 2,577,547 |  | 2,650,393
Total | ¥ 24,386,010 | $ 3,443,039 | ¥ 71,314,254

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