A view in front of Tiananmen Square in Beijing, Jan 31, 2020. (Photos: chinadaily.com.cn)

A staff member measures temperatures of tourists at the entrance of Jingshan Park in Beijing, Jan 31, 2020.

A passenger holds a baby, both wearing masks, at Beijing Railway Station, Jan 31, 2020.

A man wears a self-made protective mask at Beijing South Railway Station, Feb 2, 2020.

Passengers wear masks at Beijing Railway Station, Jan 31, 2020.

The outside of the Palace Museum's Shenwumen, or the Gate of Divine Prowess in Beijing, Jan 31, 2020. The Palace Museum announced earlier it would be temporarily closing its doors on Jan 25 for the need to control the coronavirus outbreak.

A person wears mask in a car in Beijing, Jan 31, 2020.

Passengers wear masks and sunglasses at Beijing Capital International Airport, Jan 24, 2020.

Passengers wear masks and sunglasses at Beijing Capital International Airport, Jan 24, 2020.

A boy wears a mask at a plane from Beijing to Dalian, Northeast China's Liaoning province, Jan 24, 2020.

A mall with few customers at Beijing’s Oriental Ginza shopping mall, Jan 30, 2020.