Marxist-Leninists do not argue that when you have a communist revolution that you'll just magically end up with communism. Look into the "dictatorship of the proletariat."
Just paint all means of oppression red and it’s going to be fine, amirite?
No, of course not. China has a strategy of democratic centralism, which actually seems to be a quite effective implementation of a democracy. Unlike in countries like the US, Chinese citizens are quite satisfied with their government.
Fair, I’m not saying it’s a definition. This is Wikipedia we’re talking about. My point was more that a “communist state” (although the term is misleading) is really in active usage referring to a country with MLs in power that are working for the benefit of their citizens to achieve communism. That’s not an exact definition either, but it should convey the point well enough in terms of currently existing countries.