Citizens wearing face masks walk on a street in Ma On Shan in Hong Kong, south China, March 7, 2022. (Xinhua/Lo Ping Fai)
Citizens line up to conduct nucleic acid testing for COVID-19 at a mobile testing site in Ma On Shan in Hong Kong, south China, March 7, 2022. (Xinhua/Lo Ping Fai)
A medical worker takes a swab sample for nucleic acid testing at a mobile testing site in Ma On Shan in Hong Kong, south China, March 7, 2022. (Xinhua/Lo Ping Fai)
A citizen wearing a face mask does exercise in Ma On Shan in Hong Kong, south China, March 7, 2022. (Xinhua/Lo Ping Fai)
A staff member guides citizens to conduct nucleic acid testing for COVID-19 at a mobile testing site in Ma On Shan in Hong Kong, south China, March 7, 2022. (Xinhua/Lo Ping Fai)
