Since June 11, when the new confirmed domestically transmitted COVID-19 cases in Beijing were continually reported, Beijing has gradually expanded its nucleic acid detection for the novel coronavirus. 

In recent days, based on the principle of “those who should be tested will be tested, and those who wish to be tested will be tested”, Beijing has started novel coronavirus nucleic acid test for its citizens. According to reports, 193 sampling sites have been set up in Beijing. 

The staff in protection clothing offer help to people who came to take the nucleic acid test (NAT) in the test center at Guang'an Stadium in Xicheng District, Beijing, June 16,2020. (Photo/Zhou Weihai)

Residents undergo the nucleic acid test at Guang'an stadium in Beijing's Xicheng district, June 16,2020. (Photo/Zhou Weihai) 

An epidemic prevention team conducts disinfection at the Beijing Railway Station, June 18,2020 (Photo/Zhou Weihai)

Epidemic prevention workers disinfect every seats carefully in the Beijing Railway Station, June 18,2020 (Photo/Zhou Weihai)

People buy fruits normally in the market after new Covid-19 cases reported in Beijing,June 18,2020 (Photo/Zhou Weihai)