v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2025
USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 49,288,095 $ 7,034,825 ¥ 34,474,814 ¥ 24,903,166  
Total net revenues, percentage 100.00% 100.00% 100.00% 100.00%  
Allowance for doubtful accounts ¥ 0   ¥ 0   $ 0
Receivables due from partners 156,330   111,251   22,313
Deferred revenues 156,300   153,200   $ 22,300
Revenues from product sales          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 37,694,400 $ 5,380,100 ¥ 26,729,523 ¥ 18,677,390  
Revenues from product sales | Product concentration risk | Product and services benchmark          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues, percentage 76.50% 76.50% 77.50% 75.00%  
Revenues from freshly brewed drinks          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 34,616,741 $ 4,940,802 ¥ 24,501,085 ¥ 16,877,880  
Revenues from freshly brewed drinks | Product concentration risk | Product and services benchmark          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues, percentage 70.20% 70.20% 71.10% 67.80%  
Revenues from other products          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 2,319,079 $ 330,999 ¥ 1,685,413 ¥ 1,241,868  
Revenues from other products | Product concentration risk | Product and services benchmark          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues, percentage 4.70% 4.70% 4.90% 5.00%  
Revenues from others          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 758,585 $ 108,272 ¥ 543,025 ¥ 557,642  
Revenues from others | Product concentration risk | Product and services benchmark          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues, percentage 1.60% 1.60% 1.50% 2.20%  
Revenues from partnership stores          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 11,593,690 $ 1,654,752 ¥ 7,745,291 ¥ 6,225,776  
Revenues from partnership stores | Product concentration risk | Product and services benchmark          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues, percentage 23.50% 23.50% 22.50% 25.00%  
Revenues from self-operated stores          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 36,242,800 $ 5,172,900 ¥ 25,591,700 ¥ 17,880,100  
Partnership stores - material sales          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues 6,959,300 993,300 5,538,600 4,157,600  
Partnership stores - Other services          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues 2,135,300 304,800 769,800 510,800  
Partnership stores - profit sharing          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues 1,638,300 233,800 848,800 680,200  
Partnership stores - equipment sales          
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES          
Total net revenues ¥ 860,800 $ 122,900 ¥ 588,200 ¥ 877,200