/kloc-0 In the spring of 905, Sun Yat-sen went to Europe from the United States, and successively preached the Three People's Principles and the Five Powers Constitution in Paris and Berlin, calling on overseas students to understand revolutionary organizations, and more than 70 people joined * * *. In July, Sun Yat-sen returned to Japan, united with revolutionary groups and revolutionaries such as Huaxing Association and Guangfu Association, and took Sun Yat-sen as the prime minister. On August 12, the China Alliance was established in Tokyo, adopted a general chapter and issued a declaration.

1February 2, 906, 65438 delivered a speech "The Three People's Principles and the Future of the Chinese Nation" in Tokyo, formally proposing the Three People's Principles and a five-power constitution.

The central content of the League Declaration is the four programmatic slogans of "Expulsion of Manchu, Restoration of China, Establishment of the Republic of China and Equal Land Ownership", which can be said to be the early form of the Three People's Principles before the Revolution of 1911. The first two were nationalism, the third was civil rights and the last was people's livelihood. The name of the Republic of China was also determined when the League was founded.