On this day 69 years ago, on December 29, 1956 (November 28, 1956 in the lunar calendar), "Revisiting the Historical Experience of the Dictatorship of the Proletariat" was published. On December 29, 1956, "Revisiting the Historical Experience of the Dictatorship of the Proletariat" was published. On December 29, 1956, the People's Daily published an article, "Revisiting the Historical Experience of the Dictatorship of the Proletariat", which first put forward the concept of contradiction between the enemy and ourselves and contradictions among the people. " "Re-discussion" points out that there are two contradictions of different natures before us, one is the contradiction between the enemy and ourselves, which is the fundamental contradiction, which is based on the conflict of interests between the hostile classes; the other is the contradiction within the people, which is not the fundamental contradiction. Its resolution must first be subordinate to the general interests of the hostile struggle. It can and should be resolved through criticism or struggle from the desire for unity, so as to achieve new unity under new conditions. The correction of Stalin's mistakes belongs to this category. Under specific historical conditions, a certain contradiction within the people can gradually be transformed into a antagonistic contradiction and become part of the contradiction between the enemy and ourselves. Poland and Hungary, while opposing the chauvinism of the great powers, have developed into anti-socialism, and their nature has changed, so decisive measures must be taken. The article also made an evaluation of Stalin, believing that Stalin's merits outweighed his faults, completely denying Stalin, and contributing to the development of revisionist ideological trends