This photo shows a disinfection robot disinfects the check-in hall at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021. (Photos: Ecns.cn)

Passengers wearing masks wait for departure at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021.

Staff members take personal protective measures to serve the passengers at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021.

Passengers wearing masks wait for departure at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021.

Staff members disinfect the exit at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021.

A staff member monitors the temperature of passengers at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021.

A staff member monitors the temperature of passengers at Terminal 2 of Shanghai Hongqiao Airport on Aug. 1, 2021.