v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segment (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues ¥ 3,027,573 $ 432,937 ¥ 2,077,157 ¥ 1,876,989
Cost of revenues 1,762,477 252,031 1,192,572 1,215,611
Net Income (Loss) 435,880 $ 62,330 (102,376) (475,968)
Property and equipment, net, intangible assets, net, operating lease right-of-use assets, and land use rights, net 1,343,123   1,174,911  
Mainland China        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 2,354,727   1,542,793 991,912
Property and equipment, net, intangible assets, net, operating lease right-of-use assets, and land use rights, net 1,232,831   1,082,352  
Thailand        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Property and equipment, net, intangible assets, net, operating lease right-of-use assets, and land use rights, net 57,165   40,555  
Switzerland        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Property and equipment, net, intangible assets, net, operating lease right-of-use assets, and land use rights, net 44,938   46,967  
United States        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Property and equipment, net, intangible assets, net, operating lease right-of-use assets, and land use rights, net 7,156   4,247  
Other regions        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Property and equipment, net, intangible assets, net, operating lease right-of-use assets, and land use rights, net 1,033   790  
Single operating segment        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net revenues 3,027,573   2,077,157 1,876,989
Cost of revenues 1,762,477   1,192,572 1,215,611
Payroll expenses in sales and marketing expenses 136,417   124,548 104,462
Payroll expenses in general and administrative expenses 138,176   146,239 175,600
Payroll expenses in research and development expenses 562,047   594,567 592,223
Other segment items (7,424)   121,607 265,061
Net Income (Loss) ¥ 435,880   ¥ (102,376) ¥ (475,968)
Other segment items description Other segment items primarily include other operating income, net, interest income, interest expenses and other (loss) income, net as reported in Group’s consolidated statements of operations and professional service expenses. Other segment items primarily include other operating income, net, interest income, interest expenses and other (loss) income, net as reported in Group’s consolidated statements of operations and professional service expenses. Other segment items primarily include other operating income, net, interest income, interest expenses and other (loss) income, net as reported in Group’s consolidated statements of operations and professional service expenses. Other segment items primarily include other operating income, net, interest income, interest expenses and other (loss) income, net as reported in Group’s consolidated statements of operations and professional service expenses.