Abstract: In the late 1920s, Peng Yuting returned to his homeland after resignation, with the will of suppressing bandits and saving people. However, through the practice, he felt that even if he succeeded in wiping out the bandits, it was still impossible for common people to be enriched and protected from banditlike army and corrupt officials. So in order to make his dream come true, Peng Yuting strived and created the theory of "Three Sells", i. e. "self-defense, self-government, self-prosperity", based on Sun Zhongshan's "Three Principles of the People". With the guidance of the theory, he initiated the Autonomy in Western Nanyang, which brought the Land of Peach Blossoms and Paradise to the inhabitants.