>>511041828 (OP)>how do they keep 1.4 billion people in check?it depends on the context... what do you mean by keeping in check
if youre talking about gvmnt deciding whatis allowed or legal, or about taxes or social policies... then they are doing it exactly the same way any other country does, individuals may oppose but crowd will follow through and obey, especially if people are scared about being exterminated from society as it happened during red revolution.
if you're asking about totalitarian 24/7 controll over everything their citizens do... they just don't, no one could do that for a 100%