v3.25.2
Summary of Significant Accounting Policies (Details)
6 Months Ended
Jun. 30, 2025
CNY (¥)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
CNY (¥)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Summary of Significant Accounting Policies [Line Items]            
Cash and cash equivalents ¥ 363,440,412       $ 50,769,761 ¥ 32,431,081
Restricted cash ¥ 468,526       65,449 418,722
Impairment of long-lived assets (in Dollars) | $        
Convertible issuance days 360 days 360 days        
Allowance for sales (in Dollars) | $        
Contract liabilities ¥ 95,626,084         ¥ 98,895,905
Revenue recognized 2,481,345   ¥ 12,066,145      
Inventory write-down 5,726,162 $ 799,900 12,395,993      
Advertising and promotion cost 650,802   245,883      
Shipping and handling costs ¥ 67,285   ¥ 226,046      
Operating segment 1 1        
United States [Member]            
Summary of Significant Accounting Policies [Line Items]            
Exchange rates 1       1  
China, Yuan Renminbi [Member]            
Summary of Significant Accounting Policies [Line Items]            
Exchange rates 7.1586       7.1586