Nothing. They were not communist utopias from a marxist point of view.
When Russia became comunist they went to China, and became buddies.
Chairman Mao.
Taiwan.
One reason for a communist victory in China was that the people believed the Communist party's Propaganda and promises. The people of China were poor and the Communist party made promises of land reform but instead they took people's land.
Basically the US (hence UN) didn't want to make things more complicated than things were, so made a deal with China and Russia. So, NK stayed communist (like China and Russia) while SK stayed decomtratic (like the US).
Mao Ze Dong
TheKoreanand Soviet Union invaded China and made it a communist country.
Joseph Stalin.
I think it's because they made Russia a communist state.
Guomindang party
china,russia,usa,uk!......
You mean Mao Zedong, he was the one who made China communist, long war.