The party's goal is to unify the economic system of the entire country under socialism. Steps were taken to implement this goal at the long-delayed Fourth National Party Congress, convened in December 1976, when the party adopted the Second Five-Year Plan and defined both its "line of socialist revolution" and its "line of building a socialist economy". The next two congresses, held in March 1982 and December 1986, respectively, reiterated this long-term communist objective and approved the five-year plans designed to guide the development of the Vietnamese economy at each specific stage of the revolution.