1In June, 883, Sun Yat-sen, who had graduated from the highest institution in Hawaii, returned to China by boat. After the ship entered the waters of China, it was blackmailed by the Qing tax collectors, and Sun Yat-sen further felt the corruption of the Qing Dynasty. After he returned to Cuiheng Village, he saw a China who was exacting taxes and levies. The villagers are conservative, the teaching in private schools is still the old rules, rote memorization and little spiritual enlightenment. 1in the first month of 887, Sun Yat-sen was transferred to Hong Kong College of Western Medicine at the age of 2 1. Graduated in five years. At that time, Hong Kong was well-ordered and bribery stood out. I also heard that Britain and Europe have excellent politics, which is the result of people's efforts. Therefore, only by changing the government can society be improved. China has only had a bad government for hundreds of years, but no good government. Therefore, after graduating from college, Sun Yat-sen decided to give up his career as a doctor and engage in medical care. He said: "It can be seen that my revolutionary ideas are entirely from Hong Kong." 1On September 30th, 896, Sun Yat-sen arrived in Liverpool by boat from new york, and arrived in London on 18+0/0/October 30th, where he met with his teacher, Condley. Later, he was followed by Qing detectives and then taken to the Qing embassy in London for house arrest. Hind's teacher, Condley, mobilized public opinion to save him. This is the famous "London suffering". Sun Yat-sen's experience in London attracted international attention and became an internationally recognized revolutionary leader in China. For personal safety, Sun Yat-sen continued to live in London and studied books on politics, diplomacy, law, military affairs, minerals and economy at the British Museum. The research and social investigation in London greatly promoted Sun Yat-sen's thought and political proposition, and his Three People's Principles thought was more complete and mature. Sun Yat-sen is a great patriot in China and the forerunner of the democratic revolution, but his contribution lies not only in China, but also in all mankind, so he belongs not only to China, but also to the whole world. Sun Yat-sen's Three People's Principles is the most critical and breakthrough guiding ideology in China's political modernization movement.