v3.26.1
Fair Value Measurement - Fair value hierarchy (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Nonrecurring    
Fair Value Measurements    
Assets fair value ¥ 0 ¥ 0
Liabilities fair value 0 0
Impairment charge 0 0
Level 1 | Recurring    
Fair Value Measurements    
Assets fair value 138,715,195 75,814,754
Level 1 | Recurring | Money Market Funds    
Fair Value Measurements    
Cash equivalents 72,681,599 31,335,350
Level 1 | Recurring | Equity securities    
Fair Value Measurements    
Short-term investments 66,033,596 44,479,404
Level 2 | Recurring    
Fair Value Measurements    
Assets fair value 51,749,817 30,174,210
Level 2 | Recurring | Available-for-sale debt securities    
Fair Value Measurements    
Short-term investments 19,599,692 6,319,014
Other non-current assets 32,150,125 23,855,196
Level 3 | Recurring    
Fair Value Measurements    
Assets fair value 494,889 506,126
Level 3 | Recurring | Investments in convertible bonds    
Fair Value Measurements    
Short-term investments ¥ 494,889 ¥ 506,126