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Financial information of the parent company (Details 1)
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
CNY (¥)
OPERATING EXPENSES            
Total operating expenses $ 21,454,984 ¥ 151,186,841   ¥ 361,596,902   ¥ 171,177,307
NET INCOME (11,578,184) (81,587,998) $ (20,279,224) (136,458,901) $ 12,750,031 81,244,474
FOREIGN CURRENCY TRANSLATION ADJUSTMENT 257,860 1,817,059   995,415   (32,022)
COMPREHENSIVE INCOME (11,291,129) (79,565,214)   (135,755,473)   ¥ 81,212,518
Parent Company [Member]            
OPERATING EXPENSES            
General and administrative (4,480,600) (32,164,435)   (28,968)    
Total operating expenses (4,480,600) (32,164,435)   (28,968)    
Equity income (loss) of subsidiaries (16,111,711) (114,125,394)   (140,903,197)    
Total other income (expense), net (16,111,711) (114,125,394)   (140,903,197)    
CHANGE IN FAIR VALUE OF WARRANT LIABILITIES 52,927 372,961   4,415,328    
NET INCOME (11,578,184) (81,587,998)   (136,458,901)    
FOREIGN CURRENCY TRANSLATION ADJUSTMENT 257,860 1,817,059   995,415    
COMPREHENSIVE INCOME $ (11,320,324) ¥ (79,770,939)   ¥ (135,463,486)