What did communist evolutions lead to in the soviet union and in china?

The communist revolutions that occurred in the Soviet Union and China in the 20th century led to the overthrow of the governments in each respective government and the establishment of new system of government's which espoused to rule by the principles of communism. From the early 1900s onward each country was ruled by communist regimes. Until today China still is ruled by the communist party and in Russia the government has changed since the fall of the Soviet Union.