![](20211015C99FC98422300001C6201F2B13001BA0_1310123533_1628767433794.jpg)
A resident registers for a COVID-19 nucleic acid test at a testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
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A medical worker takes a swab sample from a woman at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
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A medical worker takes a swab sample from a woman at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker takes a swab sample from a woman at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A resident registers for a COVID-19 nucleic acid test at a testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker takes a swab sample from a child at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker takes a swab sample from a man at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker takes a swab sample from a man at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A resident registers for a COVID-19 nucleic acid test at a testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker shows a drawing by a primary student at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker takes a swab sample from a woman at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A resident registers for a COVID-19 nucleic acid test at a testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A community volunteer helps a senior walk to a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)
![](\pageflag.gif)
A medical worker takes a swab sample from a woman at a COVID-19 nucleic acid testing site in Jiangning District of Nanjing, capital city of east China's Jiangsu Province, Aug. 12, 2021. The district has launched a new round of COVID-19 testing since Wednesday. (Xinhua/Ji Chunpeng)