A citizen registers for COVID-19 nucleic acid test at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
Citizens register for COVID-19 nucleic acid tests at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A medical worker takes a swab sample from a citizen at a COVID-19 nucleic acid testing site in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A staff member escorts a 93-year-old man home after a COVID-19 nucleic acid testing in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A staff member prepares to transfer a 93-year-old man for COVID-19 nucleic acid testing in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A staff member transfers a 93-year-old man for COVID-19 nucleic acid testing in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
A staff member helps a 93-year-old man register information for COVID-19 nucleic acid testing in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
Staff members transfer a 93-year-old man for COVID-19 nucleic acid testing in Guangling District of Yangzhou, east China's Jiangsu Province, Aug. 11, 2021. The city launched its sixth round of mass nucleic acid testing on Wednesday. (Xinhua/Li Bo)
