Seventy-seven years ago today, on March 1, 1948 (January 21, 1948), Mao Zedong advocated the unity of the national bourgeoisie. On March 1, 1948, the Communist Party of China issued an intra-party directive "On the Question of the National Bourgeoisie and the Enlightened Gentlemen". At the same time, a series of directives such as "On Several Important Issues in the Current Party's Policy", "On the Policy of Industry and Commerce", and "Correcting the" Left "Error in the Propaganda of Land Reform" were successively issued to correct the "Left" bias in land reform and party consolidation.