1900, the Boxer Rebellion broke out in northern China, and the political situation was chaotic. It was a moment of "life and death, stripping and recovery, slave and master, barren and fat". Sun Yat-sen "came into being" and sent Yang, Zheng Shiliang to Hong Kong and Huizhou to prepare for the uprising. At this time, in order to prevent the boxer movement from developing southward, Britain encouraged Li Hongzhang, governor of Guangdong and Guangxi, to "become independent" in South China, and wooed Sun Yat-sen to cooperate with Li Hongzhang. 1900 In May and June, Liu Xue, Li Hongzhang's chief of staff, inquired and told Sun Yat-sen that Li Hongzhang was interested in the independence of Guangdong and Guangxi, and asked Sun Yat-sen to come to Guangdong for cooperation. Sun Yat-sen doesn't believe that Li Hongzhang can have the courage, but he is willing to give it a try. While continuing to intensify the planning of the armed uprising, he sent representatives to Hongkong for consultation and negotiation with Liu Xue. Later, seeing that the rule of Empress Dowager Cixi did not collapse, Li Hongzhang decided to go north, and Sun Yat-sen's illusion was shattered, so he decided to re-prepare for the armed uprising.