Photo taken on Aug. 5, 2021 shows a mobile lab for COVID-19 nucleic acid testing in Wuchang District of Wuhan, central China's Hubei Province.Photo:Xinhua
A medical worker works in a mobile lab for COVID-19 nucleic acid testing in Wuchang District of Wuhan, central China's Hubei Province, Aug. 5, 2021.Photo:Xinhua
A medical worker works in a mobile lab for COVID-19 nucleic acid testing in Wuchang District of Wuhan, central China's Hubei Province, Aug. 5, 2021.Photo:Xinhua
A medical worker works in a mobile lab for COVID-19 nucleic acid testing in Wuchang District of Wuhan, central China's Hubei Province, Aug. 5, 2021.Photo:Xinhua