This article is an interesting listen. It reminded me of an article I posted a few months back about Microsoft helping the NYPD do pretty much the same thing (See http://www.huffingtonpost.com/2012/08/09/nypd-domain-awareness-surveillance-system-built-microsoft_n_1759976.html).
I guess the only difference is the United States has not quite reached the programs full potential. Either that are we are much more quiet about it. Nevertheless this should not scare anyone for visiting China however it should wake people up about what is soon to come in a city near you. As I mentioned earlier when the news first came out about NYPD, if it was created by Microsoft you better believe Washington State metropolitan cities like Bellevue and Seattle are not far from trying to get these laws implemented. Seeing as how the Seattle Police Department already has a drone, I mean why would not they have the technology to spy on anyone they please?