For whoever this is news to, check out this XinhuaNet[0] article on holding group administrators accountable for things said in their groups. That they're able to view things is implicit in that. Then check out the pushes for Real Name Identification with online services[1] and phone numbers [2]. Check out the social credit system[3], mandatory by 2020[4]. The national face recognition system [5]. Its actually kinda incredible.
[0]http://news.xinhuanet.com/english/2017-09/08/c_136592568.htm [1]https://ifex.org/china/2017/09/06/ban-anonymous-content/ [2]https://www.techinasia.com/china-start-enforcing-realname-mo...! [3]https://www.wired.co.uk/article/chinese-government-social-cr... [4]https://investmentwatchblog.com/in-china-every-citizen-is-be... [5]https://technode.com/2017/10/13/china-makes-progress-on-its-...