I think socialism by definition forbids private ownership of capital. So countries that allow for private capital (which is most countries) are not socialist. North Korea does not allow private ownership of capital, so they certainly qualify as purely socialist. I believe Laos is similar. Same with Cuba.
China is interesting in that they used to be socialist, and have since transitioned in recent decades to a sort of state capitalism. There are still heavy restrictions on private capital in that you can own it, provided it's in partnership with the state (to some extent). See Jack Ma and his issues with Ali Baba as an example.
China is interesting in that they used to be socialist, and have since transitioned in recent decades to a sort of state capitalism. There are still heavy restrictions on private capital in that you can own it, provided it's in partnership with the state (to some extent). See Jack Ma and his issues with Ali Baba as an example.