Home A medical worker collects a swab sample from a worker for nucleic acid tests at Harbin Turbine Company Limited in Harbin, northeast China’s Heilongjiang Province, March 28, 2022. (Xinhua/Zhang Tao) A medical worker collects a swab sample from a worker for nucleic acid tests at Harbin Turbine Company Limited in Harbin, northeast China's Heilongjiang Province, March 28, 2022. (Xinhua/Zhang Tao)
A medical worker collects a swab sample from a worker for nucleic acid tests at Harbin Turbine Company Limited in Harbin, northeast China’s Heilongjiang Province, March 28, 2022. (Xinhua/Zhang Tao)
