Staff members wear protective face shields at Beijing South Railway Station in Beijing, capital of China, Feb. 1, 2021. Beijing South Railway Station carries out a series of COVID-19 prevention and control measures to make sure the safety of passengers during the Spring Festival travel season. (Xinhua/Li Xin)

A staff member conducts disinfection process at Beijing South Railway Station in Beijing, capital of China, Feb. 1, 2021. Beijing South Railway Station carries out a series of COVID-19 prevention and control measures to make sure the safety of passengers during the Spring Festival travel season. (Xinhua/Li Xin)

Passengers check in with an orderly manner at Beijing South Railway Station in Beijing, capital of China, Feb. 1, 2021. Beijing South Railway Station carries out a series of COVID-19 prevention and control measures to make sure the safety of passengers during the Spring Festival travel season. (Xinhua/Li Xin)

A staff member conducts disinfection process at Beijing South Railway Station in Beijing, capital of China, Feb. 1, 2021. Beijing South Railway Station carries out a series of COVID-19 prevention and control measures to make sure the safety of passengers during the Spring Festival travel season. (Xinhua/Li Xin)