It has been my thesis for a number of years now that attempts to establish Communism last for at most 5-10 years, after which the government reverts back to its previous form of authoritarianism.

Stalin ruled more like a Tsar than a Communist (even Trotsky accused him of abandoning the revolution).

Mao's hero was Qin Shi Huang, the first emperor of a united China who based his reign on the principles of Legalism.

Communism ultimately does not exist in reality. Nor can it.