Federal union for a country with many different nationalities (USSR), unitary state with autonomous regions for countries where one nationality makes up most of the population but there are significant minorities (China), unitary state for one-nation countries (Cuba).
Federal union for a country with many different nationalities (USSR), unitary state with autonomous regions for countries where one nationality makes up most of the population but there are significant minorities (China), unitary state for one-nation countries (Cuba).