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Summary of Significant Accounting Policies - Schedule of Consolidated Statements of Operations (Details)
6 Months Ended
Jun. 30, 2025
CNY (¥)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
CNY (¥)
Condensed Statement of Income Captions [Line Items]      
Net revenues ¥ 7,673,997 $ 1,071,249 ¥ 209,303,030
Cost of revenues (6,152,154) (858,807) (167,646,023)
Total operating expenses (10,369,585) (1,446,851) (16,095,061)
Total other expenses, net (52,087) (7,270) (291,704)
Income tax benefits (267) (37) 2,353,476
Net income (loss) ¥ (8,900,095) $ (1,241,716) ¥ 27,623,718