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Share-Based Compensation - Stock option Activities (Details) - Stock options - 2018 Plan - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of shares        
Outstanding at the beginning of period (in shares) 130,156,288 93,464,488 104,543,578  
Grant to Employees (in shares)   94,543,900    
Exercised (in shares) (49,409,787) (50,219,050)    
Forfeited (in shares) (6,615,475) (7,633,050) (11,079,090)  
Outstanding at the end of period (in shares) 74,131,026 130,156,288 93,464,488 104,543,578
Exercisable (in shares) 73,314,401      
Weighted average exercise price        
Outstanding (in dollars per share) $ 0.0000001 $ 0.0000001 $ 0.0000001 $ 0.0000001
Exercised (in dollars per share) 0.0000001 0.0000001    
Forfeited (in dollars per share) 0.0000001 $ 0.0000001 $ 0.0000001  
Exercisable (in dollars per share) $ 0.0000001      
Weighted average remaining contractual term        
Outstanding (in Years) 2 years 8 months 8 days 4 years 7 days   3 years 11 months 23 days
Exercisable at the end of period (in years) 2 years 8 months 4 days      
Weighted average grant date fair value        
Outstanding (in dollars per share) $ 0.59 $ 0.44   $ 1.38
Exercisable (in dollars per share) $ 0.59