v3.25.1
Summary of significant accounting policies (Details 2)
 12 Months Ended
Dec. 31, 2024
Minimum  
Land use rights, net  
Estimated useful lives (in years) 18 years
Maximum  
Land use rights, net  
Estimated useful lives (in years) 70 years
Customer relationship | Minimum  
Intangible assets, net  
Estimated useful lives (in years) 3 years
Customer relationship | Maximum  
Intangible assets, net  
Estimated useful lives (in years) 10 years
Technology and others | Minimum  
Intangible assets, net  
Estimated useful lives (in years) 3 years
Technology and others | Maximum  
Intangible assets, net  
Estimated useful lives (in years) 10 years
Non-compete Agreement | Minimum  
Intangible assets, net  
Estimated useful lives (in years) 5 years
Non-compete Agreement | Maximum  
Intangible assets, net  
Estimated useful lives (in years) 8 years
Domain names and trademarks | Minimum  
Intangible assets, net  
Estimated useful lives (in years) 5 years
Domain names and trademarks | Maximum  
Intangible assets, net  
Estimated useful lives (in years) 20 years