On this day, 64 years ago, May 31, 1961 (April 17, 1961, the lunar calendar), Liu Shaoqi proposed that "three parts of natural disasters and seven parts of man-made disasters." On May 31, 1961, Liu Shaoqi said at the Central Work Conference: "Are the problems that have occurred in recent years due to natural disasters? Or is it due to shortcomings and mistakes in our work? There is a saying among Hunan farmers. They say it is 'three-part natural disaster, seven-part man-made disaster.' I also asked several provincial party committee cadres. I asked Comrade Tao Lujia: In Shanxi, are natural disasters the main cause, or are shortcomings and mistakes in work the main cause? He said that shortcomings and mistakes at work are the main reason for the current difficulties. Comrades from Hebei, Shandong and Henan also said the same. Nationwide, in some places, natural disasters are the main cause, but I'm afraid this is not the majority; in most places, shortcomings and mistakes in our work are the main cause. ¡±