Staff familiarize themselves with the work at Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province, Dec. 27, 2020. The airport expansion project has been completed and is set to be put into use on Dec. 31. (Photos: Xinhua)

Security staff check a person at Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province, Dec. 27, 2020. The airport expansion project has been completed and is set to be put into use on Dec. 31.

Photo taken on Dec. 27, 2020 shows the interior of Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province. The airport expansion project has been completed and is set to be put into use on Dec. 31.

Photo taken on Dec. 27, 2020 shows the interior of Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province. The airport expansion project has been completed and is set to be put into use on Dec. 31. (Xinhua/Guo Cheng)

Photo taken on Dec. 27, 2020 shows the interior of Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province. The airport expansion project has been completed and is set to be put into use on Dec. 31.

Staff transfer packed rubbish at Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province, Dec. 27, 2020. The airport expansion project has been completed and is set to be put into use on Dec. 31.

Photo taken on Dec. 27, 2020 shows the interior of Terminal 2 of the second-phase expansion project of Haikou Meilan International Airport in Haikou, south China's Hainan Province. The airport expansion project has been completed and is set to be put into use on Dec. 31.