A medical worker takes a swab sample from a child at a nucleic acid testing site in Xiangfang District of Harbin, northeast China's Heilongjiang Province, March 26, 2022. (Xinhua/Wang Jianwei)
A medical worker takes a swab sample from a citizen at a nucleic acid testing site in Daoli District of Harbin, northeast China's Heilongjiang Province, March 26, 2022. (Xinhua/Zhang Tao)
Medical workers take swab samples from citizens at a nucleic acid testing site in Xiangfang District of Harbin, northeast China's Heilongjiang Province, March 26, 2022. (Xinhua/Wang Jianwei)
A medical worker takes a swab sample from a citizen at a nucleic acid testing site in Daoli District of Harbin, northeast China's Heilongjiang Province, March 26, 2022. (Xinhua/Zhang Tao)
A medical worker takes a swab sample from a citizen at a nucleic acid testing site in Xiangfang District of Harbin, northeast China's Heilongjiang Province, March 26, 2022. (Xinhua/Wang Jianwei)
