A staff member disinfects the waiting room every 4 hours at Beijing Railway Station in Beijing, capital of China, Jan. 12, 2021. Measures of COVID-19 prevention and control have been strengthened at the Beijing Railway Station. [Photo by Li Xin/Xinhua]

A staff member (2nd L) helps passengers keep social distancing at the ticket entrance of Beijing Railway Station in Beijing, capital of China, Jan. 12, 2021. Measures of COVID-19 prevention and control have been strengthened at the Beijing Railway Station. [Photo by Li Xin/Xinhua]

A staff member reminds people about the COVID-19 prevention at Beijing Railway Station in Beijing, capital of China, Jan. 12, 2021. Measures of COVID-19 prevention and control have been strengthened at the Beijing Railway Station. [Photo by Li Xin/Xinhua]

A staff member disinfects the waiting room every 4 hours at Beijing Railway Station in Beijing, capital of China, Jan. 12, 2021. Measures of COVID-19 prevention and control have been strengthened at the Beijing Railway Station. [Photo by Li Xin/Xinhua]