A medical worker collects a swab sample from a resident at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
Medical workers collect swab samples at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
People prepare to receive nucleic acid tests at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
A medical worker collects a swab sample from a child at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
People wait in line for nucleic acid tests at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
People wait in line for nucleic acid tests at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
A medical worker collects a swab sample from a man at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
A medical worker collects a swab sample from a man at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
People are seen at a COVID-19 testing site in Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital) in Shenzhen, south China's Guangdong Province, Jan. 26, 2021. Shenzhen has set up 324 nucleic acid testing sites around the city and more testing sites will be added as Spring Festival travel rush is approaching. (Xinhua/Mao Siqian)
