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Treasury Shares - Summary of Treasury shares (Detail) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2019
Dec. 31, 2020
Statement [Line Items]      
Beginning balance ¥ 2    
Beginning balance, Shares 1,231,150,560    
Repurchase of ordinary shares ¥ 5,560,104    
Issuance of ordinary shares for share-based payment, Shares     1,231,150,560
Ending balance 5,560,104    
Treasury shares [member]      
Statement [Line Items]      
Beginning balance ¥ 2 ¥ 1  
Beginning balance, Shares 35,644,803 20,644,803  
Repurchase of ordinary shares ¥ 5,560,104    
Repurchase of ordinary shares, Shares 53,507,241    
Retirement of ordinary shares ¥ (2)    
Retirement of ordinary shares, Shares (35,644,803)    
Issuance of ordinary shares for share-based payment   ¥ 1  
Issuance of ordinary shares for share-based payment, Shares 8,000,000 15,000,000  
Exercise of share-based payment, Shares (2,219,927)    
Ending balance ¥ 5,560,104 ¥ 2  
Ending balance, Shares 59,287,314 35,644,803