China is using phone trackers and other tools to track protestors, the first time mass surveillance has been directed at middle-class people in affluent cities (New York Times)

New York Times:
China is using phone trackers and other tools to track protestors, the first time mass surveillance has been directed at middle-class people in affluent cities  —  After a weekend of protests, the authorities in China are using the country’s all-seeing surveillance apparatus to find those bold enough to defy them.