Mao Zedong was the earliest advocator of the ideological line of seeking truth from facts of China's * * * production party. Mao Zedong first used the word "ideological line" in his letter to Lin Biao on June 1929. 1930 in may, the book against bookishness clearly put forward the concept of "ideological line". 1937 The philosophical works "On Practice" and "On Contradiction" written in July and August laid a solid theoretical foundation for the formation of the ideological line of seeking truth from facts.

In the political report "On the New Stage" made by the Sixth Plenary Session of the Sixth Central Committee 1938, Mao Zedong used the concept of "seeking truth from facts" for the first time, advocated that "party member should be a model of seeking truth from facts" and put forward the proposition of "China Marxism". 1941may, Mao Zedong scientifically explained the concept of "seeking truth from facts" for the first time in "transforming our knowledge", and raised it to the height of the fundamental attitude towards Marxism-Leninism and the principle of party spirit. This marks the formation of the ideological line of seeking truth from facts. The Seventh National Congress of the Communist Party of China (CPC) established seeking truth from facts advocated by Mao Zedong as the ideological line of the whole party. After the Seventh National Congress of the Communist Party of China, the Party's ideological line of seeking truth from facts has been continuously developed and enriched in the practice of China's revolution and construction.