2. Overthrow the feudal monarchy and defend the Republican system. The revolution led by Dr. Sun Yat-sen overthrew the feudal autocracy in China and established a bourgeois republic, which is the greatest historical achievement of Dr. Sun Yat-sen. In order to safeguard the later Republic, Dr. Sun Yat-sen never stopped from protecting the law to the Northern Expedition.
3. Dr. Sun Yat-sen made more progress in his later years, which promoted the establishment of the revolutionary United front and directly promoted the arrival of the first revolutionary climax in China. His new interpretation of the Three People's Principles became the basis of cooperation between the Kuomintang and the Communist Party. With the support of the revolutionary government led by Sun Yat-sen, the workers' and peasants' movements have flourished, and Sun Yat-sen is getting closer and closer. He attended the rally of workers and peasants, praised them as pioneers and foundations of the revolution, and put forward the slogan "Land to the tiller".