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Principal Accounting Policies - Property and Equipment, Net (Details)
Dec. 31, 2024
Property, Plant and Equipment [Line Items]  
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember
Electronic equipment | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Property equipment, useful life 5 years
Electronic equipment | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Property equipment, useful life 3 years
Furniture, computers and office equipment  
Property, Plant and Equipment [Line Items]  
Property equipment, useful life 3 years
Network equipment  
Property, Plant and Equipment [Line Items]  
Property equipment, useful life 3 years
Self-developed Software | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Property equipment, useful life 5 years
Self-developed Software | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Property equipment, useful life 3 years