On this day, 65 years ago, on March 22, 1960 (February 25, 1960, the lunar calendar), Mao Zedong's instructions on the "Angang Iron and Steel Constitution" were issued. On March 22, 1960, Mao Zedong drafted an instruction on the "Angang Constitution" on behalf of the Central Committee of the Communist Party of China and was published. This instruction is the principle for managing socialist enterprises proposed by Mao Zedong in the instructions given by the Anshan Municipal Committee of the Communist Party of China in the "Report on the Development of Technological Innovation and Technological Revolution Movement on the Industrial Front". Its content is: adhere to politics in charge, strengthen the party's leadership, carry out mass movements, implement two participation, one reform and three combinations, and carry out technological innovation and technological revolution. The comment declared: "The Angang Iron and Steel Constitution appeared in the Far East and in China."