Communism is a classless, stateless society. The above countries are socialist nations which are striving to achieve communism through class struggle and the dictatorship of the proletariat. Each of them have their own methods of governance that best reflects their material conditions and the goals they need to achieve for their respective conditions. If you are really interested there are some very good reading lists available on lemmygrad.

If everything is shared while living a communist way of life

Aht aht stop right there. What book written by a communist author says this?