During the 22nd Congress of the Communist Party of the Soviet Union in 1961, Nikita Khrushchev announced the completion of socialist construction and declared the optimistic goal of achieving communism in twenty years. The Eastern Bloc was a political and economic bloc of Soviet-aligned socialist states in Eastern and Central Europe which adhered to Marxism–Leninism, Soviet-style governance and economic planning in the form of the administrative-command system and command economy. China's socio-economic structure has been referred to as "nationalistic state capitalism" and the Eastern Bloc (Eastern Europe and the Third World) as "bureaucratic-authoritarian systems."