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Share Based Compensation - Summary of Share Option Activities (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Number of options Outstanding, Beginning Balance 13,988,681 15,943,140  
Number of options, Granted 6,869,069 1,726,988  
Number of options, Forfeited (287,482) (3,681,447)  
Number of options, Exercised (2,627,997)    
Number of options Outstanding, Ending Balance 17,942,271 13,988,681 15,943,140
Number of options, Expect to vest 17,942,271    
Number of options, Exercisable 9,459,362    
Weighted average exercise price per share, Outstanding, Beginning Balance ¥ 0.61 ¥ 0.66  
Weighted average exercise price per share, Granted 0.65 0.68  
Weighted average exercise price per share, Forfeited 0.65 0.67  
Weighted average exercise price per share, Exercised 0.52    
Weighted average exercise price per share, Outstanding, Ending Balance 0.63 0.61 ¥ 0.66
Weighted average exercise price per share, Expect to vest 0.63    
Weighted average exercise price per share, Exercisable 0.62    
Weighted average grant date fair value per share, Outstanding, Beginning Balance 14.74 11.88  
Weighted average grant date fair value per share, Granted 57.05 40.90  
Weighted average grant date fair value per share, Forfeited 40.40 9.90  
Weighted average grant date fair value per share, Exercised 6.23    
Weighted average grant date fair value, Outstanding, Ending Balance 31.78 ¥ 14.74 ¥ 11.88
Weighted average grant date fair value, Expect to vest 31.78    
Weighted average grant date fair value, Exercisable ¥ 16.78    
Weighted average remaining contractual life, Outstanding 7 years 14 days 6 years 4 months 17 days 7 years 1 month 28 days
Weighted average remaining contractual life, Exercisable 5 years 6 months 21 days    
Aggregate intrinsic value, Outstanding ¥ 676,115 ¥ 651,182 ¥ 593,890
Aggregate intrinsic value, Exercisable ¥ 356,554