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Redeemable Convertible Preferred Shares - Summary of Redeemable Convertible Preferred Shares (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
CNY (¥)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
CNY (¥)
shares
Dec. 31, 2019
CNY (¥)
shares
Temporary Equity [Line Items]        
Deemed Dividend, Value ¥ 0 $ 0 ¥ 0 ¥ 46,168
Series Angel Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 5,910,100 5,910,100 5,910,100 5,910,100
Beginning balance | ¥ ¥ 12,400   ¥ 11,664 ¥ 10,800
Re-designation from ordinary shares to Series Angel+ preferred shares, Shares       0
Re-designation from ordinary shares to Series Angel+ preferred shares | ¥       ¥ 0
Issuance of Preferred Shares, Shares 0 0
Issuance of Preferred Shares, Value | ¥   ¥ 0 ¥ 0
Accretion of Preferred Shares, Shares 0 0 0 0
Accretion of Preferred Shares, Value | ¥ ¥ 396   ¥ 736 ¥ 864
Deemed Dividend, Shares       0
Deemed Dividend, Value | ¥       ¥ 0
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (5,910,100) (5,910,100)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (12,796)      
Ending balance ¥ 0 $ 0 ¥ 12,400 ¥ 11,664
Ending balance, Shares 0 0 5,910,100 5,910,100
Series Angel+ Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 8,268,950 8,268,950 7,803,400 0
Beginning balance | ¥ ¥ 40,686   ¥ 27,512 ¥ 0
Re-designation from ordinary shares to Series Angel+ preferred shares, Shares       7,803,400
Re-designation from ordinary shares to Series Angel+ preferred shares | ¥       ¥ 18,577
Issuance of Preferred Shares, Shares 465,550 0
Issuance of Preferred Shares, Value | ¥   ¥ 10,967 ¥ 0
Accretion of Preferred Shares, Shares 0 0 0 0
Accretion of Preferred Shares, Value | ¥ ¥ 1,151   ¥ 2,207 ¥ (37,233)
Deemed Dividend, Shares       0
Deemed Dividend, Value | ¥       ¥ 46,168
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (8,268,950) (8,268,950)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (41,837)      
Ending balance ¥ 0 $ 0 ¥ 40,686 ¥ 27,512
Ending balance, Shares 0 0 8,268,950 7,803,400
Series Pre-A Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 8,985,050 8,985,050 8,985,050 8,985,050
Beginning balance | ¥ ¥ 54,796   ¥ 50,764 ¥ 47,004
Re-designation from ordinary shares to Series Angel+ preferred shares, Shares       0
Re-designation from ordinary shares to Series Angel+ preferred shares | ¥       ¥ 0
Issuance of Preferred Shares, Shares 0 0
Issuance of Preferred Shares, Value | ¥   ¥ 0 ¥ 0
Accretion of Preferred Shares, Shares 0 0 0 0
Accretion of Preferred Shares, Value | ¥ ¥ 2,126   ¥ 4,032 ¥ 3,760
Deemed Dividend, Shares       0
Deemed Dividend, Value | ¥       ¥ 0
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (8,985,050) (8,985,050)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (56,922)      
Ending balance ¥ 0 $ 0 ¥ 54,796 ¥ 50,764
Ending balance, Shares 0 0 8,985,050 8,985,050
Series A Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 22,096,550 22,096,550 22,096,550 22,096,550
Beginning balance | ¥ ¥ 142,337   ¥ 131,855 ¥ 122,088
Re-designation from ordinary shares to Series Angel+ preferred shares, Shares       0
Re-designation from ordinary shares to Series Angel+ preferred shares | ¥       ¥ 0
Issuance of Preferred Shares, Shares 0 0
Issuance of Preferred Shares, Value | ¥   ¥ 0 ¥ 0
Accretion of Preferred Shares, Shares 0 0 0 0
Accretion of Preferred Shares, Value | ¥ ¥ 5,521   ¥ 10,482 ¥ 9,767
Deemed Dividend, Shares       0
Deemed Dividend, Value | ¥       ¥ 0
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (22,096,550) (22,096,550)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (147,858)      
Ending balance ¥ 0 $ 0 ¥ 142,337 ¥ 131,855
Ending balance, Shares 0 0 22,096,550 22,096,550
Series A+ Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 1,060,200 1,060,200 1,060,200 1,060,200
Beginning balance | ¥ ¥ 14,308   ¥ 13,254 ¥ 12,272
Re-designation from ordinary shares to Series Angel+ preferred shares, Shares       0
Re-designation from ordinary shares to Series Angel+ preferred shares | ¥       ¥ 0
Issuance of Preferred Shares, Shares 0 0
Issuance of Preferred Shares, Value | ¥   ¥ 0 ¥ 0
Accretion of Preferred Shares, Shares 0 0 0 0
Accretion of Preferred Shares, Value | ¥ ¥ 555   ¥ 1,054 ¥ 982
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (1,060,200) (1,060,200)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (14,863)      
Ending balance ¥ 0 $ 0 ¥ 14,308 ¥ 13,254
Ending balance, Shares 0 0 1,060,200 1,060,200
Series B Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 19,473,100 19,473,100 19,473,100 17,140,700
Beginning balance | ¥ ¥ 364,419   ¥ 340,234 ¥ 277,706
Re-designation from ordinary shares to Series Angel+ preferred shares, Shares       0
Re-designation from ordinary shares to Series Angel+ preferred shares | ¥       ¥ 0
Issuance of Preferred Shares, Shares 0 2,332,400
Issuance of Preferred Shares, Value | ¥   ¥ 0 ¥ 37,159
Accretion of Preferred Shares, Shares 0 0 0 0
Accretion of Preferred Shares, Value | ¥ ¥ 17,949   ¥ 24,185 ¥ 25,369
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (19,473,100) (19,473,100)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (382,368)      
Ending balance ¥ 0 $ 0 ¥ 364,419 ¥ 340,234
Ending balance, Shares 0 0 19,473,100 19,473,100
Series B2 Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 11,072,800 11,072,800 11,072,800 0
Beginning balance | ¥ ¥ 236,139   ¥ 220,030 ¥ 0
Issuance of Preferred Shares, Shares       11,072,800
Issuance of Preferred Shares, Value | ¥       ¥ 203,707
Accretion of Preferred Shares, Value | ¥ ¥ 11,702   16,109 16,323
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (11,072,800) (11,072,800)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (247,841)      
Ending balance ¥ 0 $ 0 ¥ 236,139 ¥ 220,030
Ending balance, Shares 0 0 11,072,800 11,072,800
Series B3 Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 28,013,200 28,013,200 28,013,200 0
Beginning balance | ¥ ¥ 841,145   ¥ 783,804 ¥ 0
Issuance of Preferred Shares, Shares       28,013,200
Issuance of Preferred Shares, Value | ¥       ¥ 737,920
Accretion of Preferred Shares, Value | ¥ ¥ 39,479   57,341 45,884
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (28,013,200) (28,013,200)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (880,624)      
Ending balance ¥ 0 $ 0 ¥ 841,145 ¥ 783,804
Ending balance, Shares 0 0 28,013,200 28,013,200
Series B4-1 Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 7,269,600 7,269,600 0 0
Beginning balance | ¥ ¥ 284,085   ¥ 0 ¥ 0
Issuance of Preferred Shares, Shares     7,269,600  
Issuance of Preferred Shares, Value | ¥     ¥ 259,914  
Accretion of Preferred Shares, Value | ¥ ¥ 3,871   24,171  
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (7,269,600) (7,269,600)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (287,956)      
Ending balance ¥ 0 $ 0 ¥ 284,085 ¥ 0
Ending balance, Shares 0 0 7,269,600 0
Series B4 Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 6,989,700 6,989,700 6,989,700 0
Beginning balance | ¥ ¥ 220,491   ¥ 204,794 ¥ 0
Issuance of Preferred Shares, Shares 6,989,750 6,989,750   6,989,700
Issuance of Preferred Shares, Value | ¥ ¥ 359,832     ¥ 195,952
Accretion of Preferred Shares, Value | ¥ ¥ (99,577)   15,697 8,842
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (13,979,450) (13,979,450)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (480,746)      
Ending balance ¥ 0 $ 0 ¥ 220,491 ¥ 204,794
Ending balance, Shares 0 0 6,989,700 6,989,700
Series C1 Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 51,329,600 51,329,600 0 0
Beginning balance | ¥ ¥ 2,964,104   ¥ 0 ¥ 0
Issuance of Preferred Shares, Shares 2,895,100 2,895,100 51,329,600  
Issuance of Preferred Shares, Value | ¥ ¥ 158,507   ¥ 2,799,817  
Accretion of Preferred Shares, Value | ¥ ¥ 133,863   164,287  
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (54,224,700) (54,224,700)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (3,256,474)      
Ending balance ¥ 0 $ 0 ¥ 2,964,104 ¥ 0
Ending balance, Shares 0 0 51,329,600 0
Series D Redeemable Convertible Preferred Shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 0 0 0 0
Beginning balance | ¥ ¥ 0   ¥ 0 ¥ 0
Issuance of Preferred Shares, Shares 49,207,650 49,207,650    
Issuance of Preferred Shares, Value | ¥ ¥ 4,547,263      
Accretion of Preferred Shares, Value | ¥ ¥ 128,382      
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (49,207,650) (49,207,650)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (4,675,645)      
Ending balance ¥ 0 $ 0 ¥ 0 ¥ 0
Ending balance, Shares 0 0 0 0
Series D+ redeemable convertible preferred shares [Member]        
Temporary Equity [Line Items]        
Beginning balance, Shares 0 0 0 0
Beginning balance | ¥ ¥ 0   ¥ 0 ¥ 0
Issuance of Preferred Shares, Shares 21,264,750 21,264,750    
Issuance of Preferred Shares, Value | ¥ ¥ 2,099,195      
Accretion of Preferred Shares, Value | ¥ ¥ 42,962      
Automatic conversion of preferred shares to ordinary shares upon IPO, Shares (21,264,750) (21,264,750)    
Automatic conversion of preferred shares to ordinary shares upon IPO | ¥ ¥ (2,142,157)      
Ending balance ¥ 0 $ 0 ¥ 0 ¥ 0
Ending balance, Shares 0 0 0 0