An Australian TV documentary, it is rare for such first-hand visual reporting in such a sensitive region:http://www.abc.net.au/foreign/content/2014/s4097689.htm

There's also a transcript for the twenty-nine minute film. At the start is some footage of attacks, including that in Beijing. The surveillance, apparently by local officials, is 24/7 and overt. Roads into the capital city have airport-style security checks for car travellers and armed police every present.