v3.26.1
Condensed financial information of the parent company - Condensed Balance Sheets (Parenthetical) (Details) - $ / shares
Dec. 31, 2025
Dec. 31, 2024
Class A Common Shares    
Condensed Balance Sheets    
Common shares, par value per share $ 0.0001 $ 0.0001
Common shares, shares authorized 4,920,000,000 4,920,000,000
Common shares, shares issued 62,971,166 63,041,500
Common shares, shares outstanding 62,971,166 63,041,500
Treasury stock, common, shares 1,415,422 442,915
Class B Common Shares    
Condensed Balance Sheets    
Common shares, par value per share $ 0.0001 $ 0.0001
Common shares, shares authorized 30,000,000 30,000,000
Common shares, shares issued 17,000,189 17,000,189
Common shares, shares outstanding 17,000,189 17,000,189
Parent Company | Class A Common Shares    
Condensed Balance Sheets    
Common shares, par value per share $ 0.0001 $ 0.0001
Common shares, shares authorized 4,920,000,000 4,920,000,000
Common shares, shares issued 62,971,166 63,041,500
Common shares, shares outstanding 62,971,166 63,041,500
Treasury stock, common, shares 1,415,422 442,915
Parent Company | Class B Common Shares    
Condensed Balance Sheets    
Common shares, par value per share $ 0.0001 $ 0.0001
Common shares, shares authorized 30,000,000 30,000,000
Common shares, shares issued 17,000,189 17,000,189
Common shares, shares outstanding 17,000,189 17,000,189