v3.26.1
Summary of Significant Principal Accounting Policies (Useful lives of property, plant and equipment) (Details)
Dec. 31, 2025
Electronic devices | Minimum  
Summary of Significant Principal Accounting Policies  
Useful life 3 years
Residual rate 0.00%
Electronic devices | Maximum  
Summary of Significant Principal Accounting Policies  
Useful life 10 years
Residual rate 5.00%
Vehicle | Minimum  
Summary of Significant Principal Accounting Policies  
Useful life 2 years
Residual rate 0.00%
Vehicle | Maximum  
Summary of Significant Principal Accounting Policies  
Useful life 5 years
Residual rate 5.00%
Furniture and office equipment | Minimum  
Summary of Significant Principal Accounting Policies  
Useful life 3 years
Residual rate 0.00%
Furniture and office equipment | Maximum  
Summary of Significant Principal Accounting Policies  
Useful life 5 years
Residual rate 5.00%
Machinery | Minimum  
Summary of Significant Principal Accounting Policies  
Useful life 6 years
Residual rate 0.00%
Machinery | Maximum  
Summary of Significant Principal Accounting Policies  
Useful life 10 years
Residual rate 5.00%
Buildings  
Summary of Significant Principal Accounting Policies  
Residual rate 5.00%
Buildings | Minimum  
Summary of Significant Principal Accounting Policies  
Useful life 38 years
Buildings | Maximum  
Summary of Significant Principal Accounting Policies  
Useful life 44 years
Leasehold improvement  
Summary of Significant Principal Accounting Policies  
Residual rate 0.00%