黄浦警方巧用智慧公安防控疫情 - 2020年02月13日

Police in Huangpu District have started using a flying drone and a wheeled robot to remind people to wear masks in public and avoid gatherings.
The drone and robot mainly patrol the most frequented areas of the district, such as the Bund.
When officers operating the drone spot people who are not wearing masks, against the requirements of the government, they will broadcast a reminder through a speaker attached to the device.