The problem with that is the fact its a descriptor. Basically ever so called communist state since the Soviet Union has in some way been influenced by so called “Marxist-Leninism” due to soviet and now chinese influence. The thing there is a shit-ton of leftists who see MLs as nothing more than fascists with a red paint job, so will thusly argue that china isnt communist.
Plus you could have a communist society which actively lynches MLs which would actively invalidate that qoute you put up.
Its a bad definition, itd be like making a definition for republics based solely on the the Commonwealth of England.