Residents register before receiving nucleic acid tests at a residential area in east China's Shanghai, March 17, 2022. (Xinhua/Liu Ying)
Citizens receive nucleic acid tests at a residential area in east China's Shanghai, March 17, 2022. (Xinhua/Liu Ying)
A medical worker guides citizens to receive nucleic acid tests at a residential area in east China's Shanghai, March 17, 2022. (Xinhua)
Citizens register before receiving nucleic acid tests at a residential area in east China's Shanghai, March 17, 2022. (Xinhua/Liu Ying)
