I'd really like to read more Chinese-from-China views on this kind of article. Although the content of the article scares me personally, it would be interesting to have more of a discourse about more plausible reasons why this kind of surveillance is "good" from a genuine different perspective. One mistake the Chinese govt makes is never explaining themselves in a plausible way so it always comes across as Orwellian.…
One of the attacks happened in a train station in Kunming where my parents' home is close to and caused mass casaulty in 2014 (https://en.wikipedia.org/wiki/2014_Kunming_attack). Surveillance in the Uyghur area has got a lot tighter since. Just like the Middle East issues to US and other western countries, Ugyhur issues to China are quite complicated. However, if the bottom line on stability/security of an area is crossed by a particular ethnic group (Uyghur Muslim in this case), maximum surveillance/crackdown would be imposed.
Areas such as Tibet, Xinjiang and Yunnan tend to get heavier surveillance treatment given their track record of independent movements. Yunnan once had its own independent military force called Dian Jun (滇军) but it soon got acquired by the Chengdu military force after the Sino-Vietnamese war due to trust issues between the Yunnan local government and the central Chinese government.