It will enable the city to welcome 35 million arrivals by 2025.
The airport has handled about 100,000 passengers a day since July 10, over 80 percent of its usual capacity.
China's aviation industry has been recovering faster than most countries emerging from the COVID lockdowns.
There will be a need for both hubs and opportunities for those longer and thinner routes.
Incoming international flights to Beijing have to land at one of 16 designated airports, where passengers are screened.
EU chamber urged China to cut subsidies to inefficient airlines; Marriott hotels' occupancy rate in China rose to 40%.
This is not the first time that the Chinese OTA has expanded into airport-related services.
The state-controlled giant is taking a step to better adjust to the market-based economy and explore monetization for its app unit.
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