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Share-based Payment (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Summary of Employee Share Options
The following table sets forth the changes in the number of outstanding options and weighted average exercise prices:
 
    
Average exercise
price per share
option
     
Number of options
(in ’000)
  
Outstanding as of January 1, 2019
      74.86        28,819  
Forfeited during the year
      73.92        (3,475 ) 
    
 
 
     
 
 
  
Outstanding as of December 31, 2019
      74.99        25,344  
    
 
 
     
 
 
  
Forfeited during the year
      79.23        (3,884 ) 
    
 
 
     
 
 
  
As of December 31, 2020
      74.22        21,460  
    
 
 
     
 
 
  
Forfeited during the year
      91.64        (1,702 ) 
    
 
 
     
 
 
  
Exercised during the year
      41.43        (1,937 ) 
    
 
 
     
 
 
  
As of December 31, 2021
      76.12        17,821  
    
 
 
     
 
 
  
 
Summary of Options at Different Exercise Price The following table sets forth the outstanding share options as of December 31, 2021 by different exercise price:
 
Exercise price per share option
   
Number of options

(in ’000)
  
8.00
      2,532  
50.00
      4,562  
98.06
      7,905  
118.00
      2,822  
    
 
 
  
       17,821  
    
 
 
  
Performance Share Units  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Summary of Employee Share Options
The following table sets forth the changes in the number of PSUs and weighted average exercise prices:
 
    
Weighted average
grant day fair value
     
Number of units
(in ’000)
  
Outstanding as of January 1, 202
0
      —        —  
Granted during the year
 
 
140.88
 
 
 
1,990
 
Forfeited during the year
 
 
141.31
 
 
 
(32
)
 
Outstanding as of December 31, 2020
 
 
140.87
 
 
 
1,958
 
Granted during the year
      82.60        1,590  
Forfeited during the year
      152.70        (223 ) 
Exercised during the year
      141.69        (283 ) 
    
 
 
     
 
 
  
Outstanding as of December 31, 2021
      109.47        3,042  
    
 
 
     
 
 
  
Summary of Options Granted Priced Using Binomial Option Pricing Model The following table sets forth the key assumptions used in the Monte Carlo Simulation model for the share unit granted during the years ended December 31, 2020 and 2021. 
    
PSUs granted in Year ended December 31,
  
    
2020
    
2021
  
Risk-free rate
     
1.61%-2.99
 %     
0.94%-1.70
 % 
Expected volatility rate
     
37.40%-38.00
 %     
55.40%-59.70
 % 
Expected dividend yield
      0.00 %     
0.00%-3.00
 %