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SIGNIFICANT ACCOUNTING POLICIES - Property, plant and equipment, net (Details)
Dec. 31, 2025
Vehicles  
Property, plant and equipment, net  
Estimated useful life 4 years
Maximum | Office building  
Property, plant and equipment, net  
Estimated useful life 40 years
Maximum | Computer equipment  
Property, plant and equipment, net  
Estimated useful life 5 years
Maximum | Furniture and office equipment  
Property, plant and equipment, net  
Estimated useful life 5 years
Minimum | Office building  
Property, plant and equipment, net  
Estimated useful life 20 years
Minimum | Computer equipment  
Property, plant and equipment, net  
Estimated useful life 3 years
Minimum | Furniture and office equipment  
Property, plant and equipment, net  
Estimated useful life 3 years