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REVENUE INFORMATION - Disaggregation of revenue (Details)
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
REVENUE INFORMATION        
Revenues ¥ 2,651,757,646 $ 373,492,253 ¥ 3,168,597,334 ¥ 3,704,537,419
Electric scooter sales        
REVENUE INFORMATION        
Revenues 2,358,658,368   2,853,895,423 3,252,988,512
Accessory and spare parts sales        
REVENUE INFORMATION        
Revenues 197,634,073   242,296,734 397,088,122
Service revenues        
REVENUE INFORMATION        
Revenues ¥ 95,465,205   ¥ 72,405,177 ¥ 54,460,785