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Investment Income - Summary of Investment Income (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Interest income      
Financial assets at amortized cost ¥ 479,043 ¥ 304,627 ¥ 194,771
Financial assets purchased under reverse repurchase agreements 83,763 29,328  
Interest income 562,806 333,955 194,771
Realized gains      
Financial assets at fair value through profit or loss 991,437 1,163,988 1,116,431
Financial assets at amortized cost 80,866    
Realized gains 1,072,303 1,163,988 1,116,431
Net change in unrealized gains/(losses)      
Financial assets at fair value through profit or loss (483,356) (558,044) (732,125)
Investment income ¥ 1,151,753 ¥ 939,899 ¥ 579,077