The closest thing to pure communism that was almost successful that I know of was Utopian Communities in the US, but they didn't work due to bad leadership.
China is more of a dictatorship. They maintain the typical opressive regime, but have given away most government ownership to make way for free enterprise. They're communists by name only.
Not to mention, communism can only be achieved after years of hardship. Lenin had gone temporarily insane when he declared the Bolsheviks the "communist party."