Changchun rolls out new round of mass nucleic acid test

A citizen receives nucleic acid test on a bus used as a temporary testing site in Changchun, northeast China's Jilin Province, March 20, 2022. Changchun rolled out a new round of mass nucleic acid test as a measure to combat the latest COVID-19 resurgence on Saturday. (Xinhua)

Citizens line up for nucleic acid test at a testing site in Changchun, northeast China's Jilin Province, March 20, 2022. Changchun rolled out a new round of mass nucleic acid test as a measure to combat the latest COVID-19 resurgence on Saturday. (Xinhua/Zhang Jian)

A medical worker takes a swab sample from a man for a nucleic acid test at a testing site in Changchun, northeast China's Jilin Province, March 20, 2022. Changchun rolled out a new round of mass nucleic acid test as a measure to combat the latest COVID-19 resurgence on Saturday. (Xinhua/Zhang Jian)

Aerial photo taken on March 20, 2022 shows citizens lining up to take nucleic acid test at a testing site in Changchun, northeast China's Jilin Province. Changchun rolled out a new round of mass nucleic acid test as a measure to combat the latest COVID-19 resurgence on Saturday. (Xinhua)