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Accounts Receivable, Net - Schedule of Accounts Receivable, Net (Details)
Jun. 30, 2025
CNY (¥)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Schedule of Accounts Receivable Net [Abstract]        
Accounts receivable ¥ 41,981,306   ¥ 74,886,095  
Allowance for credit losses (38,308,560)   (38,352,201) ¥ (37,610,720)
Accounts receivable, net ¥ 3,672,746 $ 512,695 ¥ 36,533,894