Medical workers from Quzhou, Zhejiang province, conduct a COVID-19 test for a child at a residential community in Shanghai's Changning district on April 7. [Photo by Gao Erqiang]

Medical workers from Quzhou, Zhejiang Province took nucleic acid test sample for residents in a community in Changning district, Shanghai on April 7.

On April 6, Shanghai rolled out more citywide testing. Until the testing is completed, the city will continue to use a temporary closed management system.