The (Imjin March seventh day), April 1, 1952, "On Contradiction, Mao Zedong wrote published.

1952, Mao Zedong wrote in 1937, "On Contradiction" published. "On Contradiction" published "target =" _blank "> On Contradiction" Following the "On Practice" for the same purpose, that in order to overcome the presence of the party serious ideological dogmatism written article outlines the dialectics and metaphysical struggle of two worldviews inherited, defended and developed Marxism dialectics This book is Mao Zedong important contribution to the treasure house of Marxist-Leninist philosophy.