v3.26.1
Parent Company Only Condensed Financial Information - Condensed statements of cash flows (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
CASH FLOWS FROM OPERATING ACTIVITIES        
Net cash provided by/(used in) operating activities ¥ (8,611,397) $ (1,231,413) ¥ 15,933,160 ¥ 50,693,521
CASH FLOWS FROM INVESTING ACTIVITIES        
Placement of time deposits (75,755,040) (10,832,827) (54,650,166) (19,107,879)
Redemption of time deposits 78,017,767 11,156,392 24,675,649 9,201,713
Placement of short-term investments (32,379,693) (4,630,235) (12,864,520) (14,820,000)
Redemption of short-term investments 32,251,947 4,611,967 8,450,000 31,135,501
Purchase of property, plant and equipment and intangible assets and land use rights (4,205,517) (601,381) (7,730,022) (6,507,190)
Net cash (used in)/provided by investing activities (703,125) (100,546) (41,137,169) (12,068)
CASH FLOWS FROM FINANCING ACTIVITIES        
Proceeds from borrowings 1,636,251 233,981 471,322 1,750,194
Net cash provided by/(used in) financing activities 767,402 109,737 (415,648) 185,385
Effects of exchange rate changes on cash, cash equivalents and restricted cash (452,773) (64,746) 198,120 44,513
Net change in cash, cash equivalents and restricted cash (8,999,893) (1,286,968) (25,421,537) 50,911,351
Cash, cash equivalents and restricted cash at beginning of the year 65,901,123      
Cash, cash equivalents and restricted cash at end of the year 56,691,765 $ 8,106,815 65,901,123  
Parent company | Reportable legal entity        
CASH FLOWS FROM OPERATING ACTIVITIES        
Net cash provided by/(used in) operating activities 166,907   205,249 56,515
CASH FLOWS FROM INVESTING ACTIVITIES        
Net cash (used in)/provided by inter-company transactions (2,497,737)   6,751,926 (3,589,329)
Placement of time deposits 0   (2,179,080) 0
Redemption of time deposits 2,144,580   0 2,137,626
Placement of short-term investments (728,570)   (364,515) 0
Net cash (used in)/provided by investing activities (1,081,727)   4,208,331 (1,451,703)
CASH FLOWS FROM FINANCING ACTIVITIES        
Proceeds from borrowings 0   0 699,300
Repayment of borrowings 0   (700,000) (338,020)
Proceeds from exercise of share options 14,661   14,658 11,953
Proceeds from issuance of ordinary shares 0   0 1,174,319
Net cash provided by/(used in) financing activities 14,661   (685,342) 1,547,552
Effects of exchange rate changes on cash, cash equivalents and restricted cash (93,867)   93,868 (5,355)
Net change in cash, cash equivalents and restricted cash (994,026)   3,822,106 147,009
Cash, cash equivalents and restricted cash at beginning of the year 4,943,339   1,121,233 974,224
Cash, cash equivalents and restricted cash at end of the year ¥ 3,949,313   ¥ 4,943,339 ¥ 1,121,233