v3.26.3
Segment reporting - Consolidated total assets (Details)
Jun. 30, 2026
CNY (¥)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
CNY (¥)
Jun. 30, 2025
CNY (¥)
Segment reporting        
Goodwill ¥ 26,550,297 $ 3,913,030 ¥ 26,550,297  
Current assets 95,881,631 14,131,204 87,901,364  
TOTAL ASSETS 235,715,086 34,740,106 ¥ 143,950,765 ¥ 85,237,144
Operating Segment        
Segment reporting        
Long-Lived Assets 113,283,158 16,695,872   19,524,399
Goodwill 26,550,297 3,913,030   26,550,297
Current assets 43,281,771 6,378,944   36,817,635
Corporate Non Segment        
Segment reporting        
Current assets 52,599,860 $ 7,752,260   2,344,813
Adult education supporting services | Operating Segment        
Segment reporting        
Long-Lived Assets 6,685,101     7,600,769
Goodwill 4,152,740     13,318,789
Current assets 11,436,157     25,425,006
Safety technology training services | Operating Segment        
Segment reporting        
Long-Lived Assets 77,828,875     442,498
Goodwill 13,923,883     5,587,375
Current assets 6,533,609     11,392,629
Online course services | Operating Segment        
Segment reporting        
Long-Lived Assets 28,769,182     11,481,132
Goodwill 7,693,654     ¥ 7,644,133
Current assets 25,070,945      
Customized equipment sales | Operating Segment        
Segment reporting        
Goodwill 780,020      
Current assets ¥ 241,060