The rule of western powers and the cowardice of feudal rulers made the Chinese nation on the verge of national subjugation. At this time, the members of the League represented by Mr. Sun Wen adopted the propaganda slogan of the Three People's Principles of "expelling the Tatars, restoring China, establishing the Republic of China, and sharing power equally". In the original program of 16, the Kuomintang (League) stated that "expel the Tatars, restore China, establish the Republic of China, and share land rights", so it later developed into the Three People's Principles of People's Livelihood, Nationality and Civil Rights. It means Sun Yat-sen's nationalism. That is, it overthrew the feudal rule of the Qing Dynasty by revolutionary means, directed the struggle at the decadent Qing Dynasty, and also dealt a blow to the imperialist forces of aggression in China. "Establishing the Republic of China" is Sun Yat-sen's civil rights thought. Is to carry out political revolution, overthrow the feudal monarchy and establish a bourgeois republic. Democracy is the core of Sun Yat-sen's Three People's Principles and the "foundation of political revolution". Theoretically, it solved the problem that revolutionaries urgently needed to solve at that time, namely, seizing the lower ground and establishing political power. "Land equalization system" is Sun Yat-sen's livelihood thought. Advocate the approval of national land price, and the existing land price belongs to the original owner. The land price increased by social progress after the revolution should be owned by the state and enjoyed by the people, so that it can be "enough for others". "Equal land rights" is a land plan.