A medical worker collects a swab sample from a resident at a COVID-19 testing site in Wangkui County, Suihua City, northeast China's Heilongjiang Province, Jan. 26, 2021. Wangkui County started its fifth round of mass nucleic acid tests on Tuesday. (Xinhua)
Medical workers work at a COVID-19 testing site in Wangkui County, Suihua City, northeast China's Heilongjiang Province, Jan. 26, 2021. Wangkui County started its fifth round of mass nucleic acid tests on Tuesday. (Xinhua)
A resident shows her ID card before receiving nucleic acid test at a COVID-19 testing site in Wangkui County, Suihua City, northeast China's Heilongjiang Province, Jan. 26, 2021. Wangkui County started its fifth round of mass nucleic acid tests on Tuesday. (Xinhua)
A medical worker collects a swab sample from a resident at a COVID-19 testing site in Wangkui County, Suihua City, northeast China's Heilongjiang Province, Jan. 26, 2021. Wangkui County started its fifth round of mass nucleic acid tests on Tuesday. (Xinhua)
