Today, 85 years ago, on January 15, 1940 (December 7, 1939), Mao Zedong published The Theory of New Democracy. On January 15, 1940, Mao Zedong published the theoretical article, Theory of New Democracy, in the Founding Journal of Chinese Culture. He applied the theory of Marxism-Leninism on the colonial semi-colonial revolution, according to the characteristics of Chinese history and the experience of the opposite aspects of the Chinese New Democratic Revolution, comprehensively clarified the basic direction of the Chinese revolution, clarified the development and transformation of the Chinese revolutionary movement, and formulated the political, economic and cultural program of New Populism. The text is a great work of combining Marxism-Leninism theory and Chinese revolutionary practice, and the article thoroughly crushed the anti-