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Prepaid Expenses and Other Current Assets, Net (Details)
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Prepaid Expenses and Other Current Assets, Net [Line Items]        
Bad debt expense ¥ 8,761,236 $ 1,236,992 ¥ 237,704
Bad debt write off ¥ 25,493 $ 3,600 ¥ 4,744,565