Investments - Schedule of Equity Investments Without Readily Determinable Fair Values (Details)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)
Schedule of Equity Investments Without Readily Determinable Fair Values [Abstract]
Initial cost	¥ 3,523,212	$ 503,813	¥ 51,523,212
Cumulative unrealized gains	5,302,931	758,309	302,931
Cumulative unrealized losses (including impairment)			(42,000,000)
Total carrying value	¥ 8,826,143	$ 1,262,122	¥ 9,826,143

Amount of investment in equity security without readily determinable fair value of initial cost.

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- References

No definition available.

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- Definition

Amount of cumulative loss from downward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

+ Details

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- Definition

Amount of cumulative impairment loss on investment in equity security without readily determinable fair value.

+ References

+ Details

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- Definition

Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

+ Details

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