Today, 107 years ago, on December 30, 1918 (Lunar Calendar, November 28, 1918), Sun Yat-sen wrote Sun Literature Thoughts. On December 30, 1918, Sun Yat-sen wrote Sun Literature Thoughts. This is part of the Strategy for the Establishment of the State. In the book, he put forward the teaching of ¡°knowing difficult to do easy.¡± He emphasized ¡°knowing difficult to do easy,¡± that is, practicing before knowing, knowing is obtained from doing, practicing is the criterion for verifying knowledge, and expressing the point of view of materialistic knowledge. But believing that there are prophets, after knowing and unknowing, he fell into the ideology. He emphasized ¡°knowing difficult to do easy,¡± and played a useful role in promoting the development of revolution for revolution