A staff member disinfects facilities at a testing site in Harbin, northeast China's Heilongjiang Province, Oct. 30, 2021.Photo:Xinhua
A staff member takes a swab sample from a child for nucleic acid test at a testing site in Harbin, northeast China's Heilongjiang Province, Oct. 30, 2021.Photo:Xinhua
Aerial photo taken on Oct. 31, 2021 shows residents lining up for nucleic acid test at a testing point in Harbin, northeast China's Heilongjiang Province.Photo:Xinhua
Photo taken on Oct. 30, 2021 shows a nucleic acid testing site in Harbin, northeast China's Heilongjiang Province.Photo:Xinhua
A staff member takes a swab sample from a resident for nucleic acid test at a testing site in Harbin, northeast China's Heilongjiang Province, Oct. 30, 2021.Photo:Xinhua