Investments - Schedule of Long-Term Investments (Details)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)
Equity method investments
Equity securities with readily determinable fair values			¥ 28,355,681
Equity securities without readily determinable fair values	8,826,143	1,262,122	9,826,143
Available-for-sale debt investment	103,709,272	14,830,229	103,709,272
Total	156,929,090	22,440,561	184,024,217
Shanghai Wiselong Enterprise Management Co., Ltd.
Equity method investments
Equity method investments	32,498,358	4,647,203	27,133,053
Other [Member]
Equity method investments
Equity method investments	¥ 11,895,317	$ 1,701,007	¥ 15,000,068

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References + Details