Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
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-Section 45
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Details)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2023 CNY (¥)
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	¥ 12,782,851	$ 1,827,923	¥ 220,724,238	¥ 227,040,251
Overseas [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	114,874		215,803,132
China [Member] \| Non VIE [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	968,850		1,023,214
China [Member] \| VIEs [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	¥ 11,699,127		¥ 3,897,892