100 years ago today, on March 11, 1925 (February 17, 1925, the lunar calendar), Sun Yat-sen signed the "Prime Minister's Will". On March 11, 1925, Sun Yat-sen signed the "Prime Minister's Will". The will pointed out: "We must arouse the people and unite the nations in the world that treat us equally to work together." In his will to the Soviet Union, he expressed his determination to implement the three major policies of "uniting with the Communist Party, uniting with Russia, and assisting workers and peasants." At the same time, Soong Ching Ling was asked to visit Moscow in his place to realize his failed wish.