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Other operating income, net
 12 Months Ended
Dec. 31, 2020
Analysis of income and expense [abstract]  
Other operating income, net Other operating income, net
 202020192018
Gain from disposal of farmland and other assets (Note 22)2,064 1,354 36,227 
Loss from the sale of subsidiaries (Note 22)(554)— — 
(Loss) / gain from commodity derivative financial instrument(8,320)(618)54,694 
Gain / (loss) from disposal of other property items2,198 (329)(95)
Net gain / (loss) from fair value adjustment of investment property1,077 (325)13,409 
Others5,522 (904)(3)
 1,987 (822)104,232