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Summary of Significant Accounting Policies (Details) - Schedule of Revenue Recognition | Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
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Schedule of Revenue Recognition [Line Items] |  |  |  |
Total revenue | ¥ 497,868,200 | $ 70,293,560 | ¥ 651,991,593 | ¥ 545,593,497
Point in time [Member] |  |  |  |
Schedule of Revenue Recognition [Line Items] |  |  |  |
Total revenue | 158,069,415 | 22,317,678 | 71,448,443 | 53,531,895
Over time [Member] |  |  |  |
Schedule of Revenue Recognition [Line Items] |  |  |  |
Total revenue | ¥ 339,798,785 | $ 47,975,882 | ¥ 580,543,150 | ¥ 492,061,602

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(26)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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