Few people are seen on the streets even though people are back to work, but the number of vehicles has increased slightly compared to the past two weeks in Xi'an City, Shaanxi Province, February 18, 2020. /Lei Jia

Everyone needs to register their name and check their temperature when they take buses. /Lei Jia

Few people pass by the Northern Street, and everyone is wearing a mask. /Lei Jia

Only those who have to buy necessities go out. /Lei Jia

Traffic police officer at Xihua Gate Cross. /Lei Jia

The air quality has changed dramatically as a result of fewer vehicles. /Lei Jia

Two security guards on patrol in Sunken Plaza near the Bell Tower and Drum Tower. /Lei Jia

A passerby in the underpass near Bell Tower. /Lei Jia

The streets are quiet and shops and hotels are still closed. /Lei Jia