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Provision for early retirement benefits (Tables)
 12 Months Ended
Dec. 31, 2019
Text block [abstract]  
Details of Provision for Early Retirement Benefits in Respect of Obligations to Early Retired Employees
Details of provision for early retirement benefits in respect of obligations to early retired employees are as follows:
 
 
  
2019
 
  
2018
 
 
  
RMB million
 
  
RMB million
 
At January 1
  
 
4
 
  
 
7
 
Provision for the year (Note 13)
  
 
—  
 
  
 
1
 
Payments made during the year
  
 
(3
) 
  
 
(4
) 
 
  
 
 
 
  
 
 
 
At December 31
  
 
1
 
  
 
4
 
Less: current portion (Note 44)
  
 
(1
) 
  
 
(2
) 
 
  
 
 
 
  
 
 
 
 
  
 
—  
 
  
 
2