Having restored a viable economic base, the leadership under Mao Zedong, Zhou Enlai, and other revolutionary veterans were prepared to embark on an intensive program of industrial growth and socialization. For this purpose, the administration adopted the Soviet economic model, based on state ownership in the modern sector, large collective units in agriculture, and centralized economic planning. The Soviet approach to economic development was manifested in the First Five-Year Plan (1953–1957).