Korean Air will reopen select Chinese routes in May; China Eastern will sell inflight meals in supermarkets.
About 576,000 people in March passed through HKIA, compared with 6.39 million in the same month last year.
China Southern Airlines started Sunday to move another 50 percent of its total flights in Beijing to Daxing airport.
The Airport Authority Hong Kong will fund a HK$2 billion purchase scheme for half a million air tickets.
Chengdu will welcome 10 of the outbound flights, while 13 will fly into Guangdong province and 10 to Hainan province.
Robots have been used at the airport to sanitize and clean public areas like toilets.
Weekly flights will be downsized to around 130, reducing the number of China's inbound airline passengers from 25,000 to around 5,000 per day.
The restrictions come into force from 12.01 am Wednesday, March 25 and will be in effect for 14 days.
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