Xiao barged his way through several queues, trying to remember the plainclothes training. Problem is, Chinese plainclothes cops operate so as to be noticed. The idea is not to blend but to intimidate. Only foreigners and Gansu peasants can't spot a plainclothes cop, runs the police academy joke: foreigners because they have never seen China, Gansu peasants because they have never seen clothes.
Paul Mason, Rare Earth.