Medical workers take swab samples from citizens for nucleic acid tests during a rainy day in Chengxi district of Xining, Northwest China's Qinghai province, May 8, 2022. [Photo/Xinhua]
A medical worker takes a swab sample from a kid for a nucleic acid test during a rainy day in Chengxi district of Xining, Northwest China's Qinghai province, May 8, 2022. [Photo/Xinhua]
People line up for nucleic acid tests during a rainy day in Chengxi district of Xining, Northwest China's Qinghai province, May 8, 2022. [Photo/Xinhua]
A medical worker takes a swab sample from a kid for a nucleic acid test during a rainy day in Chengxi district of Xining, Northwest China's Qinghai province, May 8, 2022. [Photo/Xinhua]
