http://www.businessinsider.com/china-now-spends-125-billion-per-year-on-riot-gear-and-stability-maintenance-2013-5
Did you know China spends more on its suppression of popular protests than it does on its military, which by size is the biggest in the world?
They have some 180,000 protests a year, many of which escalate to riots, most of them concerning Communist Party official corruption.
In Tibet, in some cities, they have extensive early warning systems–and large number of police/military on constant stand-by–so that when Tibetan monks set themselves on fire, they can be doused and hurriedly removed from the public space within 3 minutes or so.