More than six years have passed since the publication of Chairman Mao's brilliant "July 21" Directive. Chairman Mao stated: "It is still necessary to have universities; here I refer mainly to colleges of science and engineering. However, it is essential to shorten the length of schooling, revolutionize education, put proletarian politics in command, and take the road of the Shanghai Machine-Tool Plant in training technicians from among the workers. Students should be selected from among workers and peasants who have practical experience, and they should return to production after a few years of study." Chairman Mao's important directive addresses itself not only to the field of education but also to our socialist industrial enterprises and the working class. Guided by Chairman Mao's directive, school education has undergone a profound change during these six years, and factory-run education has developed greatly. The more we travel along the "July 21" road, the more it broadens.