A volunteer helps a foreigner register for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 10, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Zhang Haoran)
A medical worker takes swab sample for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 7, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Zhu Xiang)
A medical worker takes swab sample for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 8, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Hao Yuan)
A volunteer (L) helps a medical worker collect tubes containing swab sample for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 10, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Zhang Haoran)
75-year-old volunteer Geng Xiaodi guides people to line up for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 7, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Li Jianan)
Volunteers guide people to line for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 8, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Zhang Haoran)
A medical worker takes swab sample for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 10, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Hao Yuan)
A volunteer helps a citizen register for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 8, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Hao Yuan)
A medical worker transports a box containing swab samples for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 10, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Hao Yuan)
Volunteers guide people to line for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 7, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Zhu Xiang)
A medical worker takes swab sample for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 8, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Zhang Haoran)
A medical worker takes swab sample for COVID-19 tests at a testing site in Zhengzhou, central China's Henan Province, Jan. 10, 2022. The city has carried out rounds of all-inclusive nucleic acid testing to help curb the spread of COVID-19. (Xinhua/Hao Yuan)
