https://www.reuters.com/article/us-hongkong-protests-airlines/airlines-ask-hong-kong-to-waive-airport-fees-as-demand-drops-letter-idUSKBN1W80DH
https://www.reuters.com/article/us-hongkong-protests-airlines/airlines-ask-hong-kong-to-waive-airport-fees-as-demand-drops-letter-idUSKBN1W80DH