四个现代化
They were introduced as early as January 1963: at the Conference on Scientific and Technological Work held in Shanghai in January 1963, Zhou Enlai called for professionals in the sciences to realize "the Four Modernizations." In February 1963, at the National Conference on Agricultural Science and Technology Work, Nie Rongzhen specifically referred to the Four Modernizations as comprising agriculture, industry, national defense, and science and technology. The Cultural Revolution prevented and delayed implementation of the Four Modernizations for years. In 1975, in one of his last public acts, Zhou Enlai made another pitch for the Four Modernizations at the 4th National People's Congress.