Passengers of the flight CZ6043 prepare to board the plane at the Changsha Huanghua International Airport in Changsha, capital of central China's Hunan Province, Oct. 14, 2020. The China Southern Airlines resumed its Changsha-Nairobi flight on Wednesday morning, which is the first regular intercontinental route resumed after the COVID-19 pandemic in central China's Hunan Province. (Photos: Xinhua/Chen Sihan)

Passengers of the flight CZ6043 queue to check in at the Changsha Huanghua International Airport in Changsha, capital of central China's Hunan Province, Oct. 13, 2020.

A passenger of the flight CZ6043 checks ticket at the Changsha Huanghua International Airport in Changsha, capital of central China's Hunan Province, Oct. 13, 2020.

A passenger of the flight CZ6043 sanitizes hands at the Changsha Huanghua International Airport in Changsha, capital of central China's Hunan Province, Oct. 13, 2020.

Staff check the information of a passenger of the flight CZ6043 at the Changsha Huanghua International Airport in Changsha, capital of central China's Hunan Province, Oct. 13, 2020.

Passengers of the flight CZ6043 board the plane at the Changsha Huanghua International Airport in Changsha, capital of central China's Hunan Province, Oct. 14, 2020.