On May 7, 1966, Mao Tse-tung wrote a letter to Lin Biao, following the report of the General Logistics Department of the Military Commission on further improving the production of military agriculture and agriculture by March 17, 1966. In this instruction, Mao Tse-tung demanded that all sectors of the country should be ¡°one university school¡±, ¡°study politics, study military, academic culture, and be able to engage in agriculture and agriculture by-production. And can run some small and medium-sized factories, produce a number of products and exchange products of equal value to the country.¡±In this instruction, Mao Tse-tung also pointed out: ¡°Students are also taught in this way, not but literature, literature, engineering, agriculture, military, and critical education of the bourgeoisie. To conduct