China News Service, March 22. According to the WeChat public account of "Healthy Shanghai 12320", from 0 to 24:00 on March 21, 2022, 31 new local confirmed cases of new coronary pneumonia and 865 asymptomatic infections were added in Shanghai, of which 30 749 confirmed cases and 749 asymptomatic infections were found in isolation and control, and the rest were found in the investigation of relevant risk groups.

There were 8 new confirmed cases of imported new coronary pneumonia and 3 asymptomatic infections, all of which were found in closed-loop control.