@glitterbag,
I've been to China and Russia a couple of times, and we were told before the trip not to talk about politics. However, in China, our local Tour Director said we can ask him any question, because the majority of Chinese do not understand English. In Russia, none of us talked about politics, but we didn't need to. We could almost feel the stifling atmosphere. When we were by the Kremlin, Putin's car was driving past our group, and we were told not to look at the cars.
When you can't even look around freely, because the head of state is passing by in his car, that speaks volumes about the control the government has on its people.