Before Hikvision made waves as a billion dollar company, there was CSST who got a ton of attention. Even a few years ago, CSST was doing ~$600 million (see our 2009 CSST review). But then their growth stalled and they announced plans to go private.
I am sure they are still around but it's very hard to find any news on them (at least in English). I found a 2012 HDcctv marketing video and a 2013 announcement of a partnership with a Chinese university.
Can anyone share any color about what CSST is up to now?