Brief introduction: Chairman Mao Zedong issued “three disciplines, six notices” in Shatian, Guidong on April 3, 1928. As one of the important parts of Mao Zedong Thought, it is a milestone of Chinese Liberation Army’s history of political discipline construction, an important content of political work of the Chinese Workers' and Peasants' Red Army, and the soul of the army for its improvement. It is honored as “first military discipline” of Chinese Liberation Army.