Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)
Schedule of Property and Equipment, Net [Line Items]
Total property and equipment	¥ 12,130,456	$ 1,734,633	¥ 11,279,995
Less: Accumulated depreciation and amortization	10,732,962	1,534,794	10,733,082
Less: Impairment	150,926	21,582	85,551
Property and equipment, net	1,246,568	178,257	461,362
Leasehold improvements [Member]
Schedule of Property and Equipment, Net [Line Items]
Total property and equipment	4,758,936	680,519	4,758,936
Office equipment and furniture [Member]
Schedule of Property and Equipment, Net [Line Items]
Total property and equipment	5,709,799	816,491	5,707,482
Motor vehicles [Member]
Schedule of Property and Equipment, Net [Line Items]
Total property and equipment	¥ 1,661,721	$ 237,623	¥ 813,577

The amount of impairment of property plant and equipment.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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