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v3.23.3

Summary of Significant Accounting Policies (Details) | 6 Months Ended |  |
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Jun. 30, 2023 CNY (¥) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 CNY (¥) | Jun. 30, 2023 USD ($) | Dec. 31, 2022 CNY (¥)
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Cash and cash equivalents | ¥ 16,839,750 |  |  | $ 2,330,503 | ¥ 87,811,272
Restricted cash | 417,565 |  |  | 57,788 | 48,112
Impairment of long-lived assets |  |  |  |  |
Advance from cusromers | 106,012,404 |  |  | $ 14,671,373 | ¥ 124,469,097
Advance from customers as revenue | 20,684,360 |  | 361,192,225 |  |
Inventory write-down | 73,273,361 | $ 10,140,519 |  |  |
Advertising and promotion cost | ¥ 1,051,572 |  | 3,212,940 |  |
United States of America, Dollars |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Translations of amounts | 1 |  |  | 1 |
China, Yuan Renminbi |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Translations of amounts | 7.2258 |  |  | 7.2258 |
Shipping and Handling [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Selling and marketing expenses | ¥ 1,795,735 |  | ¥ 2,891,328 |  |

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