The photo, taken on March 27, shows a medical worker taking a swab sample from a child for a nucleic acid test at a kindergarten in Tianxin District, Changsha City. Tianxin and Furong Districts of Changsha launched the fourth round of nucleic acid testing that day. The districts and neighborhoods have taken multiple measures to expand the coverage of nucleic acid testing to curb the spread of COVID-19. (Photo/Gu Pengbo, Hunan Daily)

The photo, taken on March 27, shows children preparing to receive nucleic acid tests at a kindergarten in Tianxin District, Changsha City. Tianxin and Furong Districts of Changsha launched the fourth round of nucleic acid testing that day. The districts and neighborhoods have taken multiple measures to expand the coverage of nucleic acid testing to curb the spread of COVID-19. (Photo/Gu Pengbo, Hunan Daily)

The photo, taken on March 27, shows residents queuing up to receive nucleic acid tests at a residential community in Tianxin District, Changsha City. Tianxin and Furong Districts of Changsha launched the fourth round of nucleic acid testing that day. The districts and neighborhoods have taken multiple measures to expand the coverage of nucleic acid testing to curb the spread of COVID-19. (Photo/Gu Pengbo, Hunan Daily)

Source: en.changsha.gov.cn