v3.26.1
Related party balances and transactions (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Related Party Transaction [Line Items]    
Total $ 247,328
Beijing Runmei Advertising Co L T D [Member]    
Related Party Transaction [Line Items]    
Total 247,328
C Rservices [Member]    
Related Party Transaction [Line Items]    
Total