Sheng Da, Heaven and Happiness are all selected from Zhuangzi's Zhuangzi Waipian. Zhuangzi was a famous philosopher and writer in ancient China. His thought is regarded as the core of Taoist thought, and the theme of "Heaven makes a living and is happy" contained in it has been deeply discussed and expounded in Xiaoyao. Achieving happiness in heaven refers to a state that people reach after surpassing themselves and life and death. People in this state are no longer limited by life and death, and can wander freely between heaven and earth and enjoy infinite life. To achieve this state, we need to go through a series of practice and cultivation, including self-cultivation, self-cultivation, self-cultivation and self-cultivation. In the aspect of self-cultivation, Zhuangzi put forward the idea of "keeping fit by static braking and keeping fit by virtue", that is, to achieve the goal of physical and mental health through self-cultivation. In nourishing nature, Zhuangzi emphasized the principle of "conforming to nature and returning to nature", that is, returning to human nature and conforming to the laws of nature can achieve inner peace and tranquility. In gas refining, Zhuangzi advocated the method of "adjusting breath to refine gas and cultivating inner elixir", that is, by cultivating inner elixir, to improve his energy and vitality.