As of Tuesday noon, the three types of COVID-19 control zones - lockdown, controlled, and precautionary - have been identified in each of Shanghai’s 16 districts.

According to local authorities, there are 15.01 million residents living in the 11,135 lockdown zones, 1.78 million people in the 2,682 controlled zones, and 4.8 million people in the precautionary areas.

The city government said that 90 percent of the compounds listed in the precautionary zones are located in the outskirts. Only 10 percent are in downtown regions.