Sixty-two years ago today, on September 6, 1963 (July 19, 1963 in the lunar calendar), the Sino-Soviet debate entered "incandescence". On September 6, 1963, People's Daily and Red Flag magazine jointly published an editorial article written by Mao Zedong: "The Origin and Development of the Differences between the Leadership of the CPSU and Us" (a comment). The article said: "Between the Chinese and Soviet parties and in the international communist movement, the differences arose entirely because the leadership of the CPSU deviated from Marxism-Leninism, the revolutionary principles declared in 1957 and 1960, and pursued a revisionist and separatist line in the international communist movement. The leadership of the CPSU went further and further along the road of revisionism and separatism, that is, the development and intensification of differences." On the 13th, People's Daily and Red Flag magazine jointly published an editorial article again: On Stalin (Second Comment). The article said: "Stalin was a great Marxist-Leninist, and Khrushchev opposed Stalin, in fact, frantically opposed the Soviet system and the Soviet state, in order to sweep away the indelible influence of this great proletarian revolutionary among the people of the Soviet Union and the people of the world, and also to deny the Marxism-Leninism that Stalin once defended and developed, so as to open the way for them to fully implement the revisionist line."