In "Su Wen · Yin Yang Ying Xiang Da Lun", the author first elaborates on the basic concepts of the theory of Yin Yang and Five Elements. It is pointed out that yin and yang are mutually opposed and interdependent phenomena in the universe, and the five elements are the basic elements that make up the universe. At the same time, the author also provides a detailed description of the laws of the Five Elements and their specific applications in the human body. For example, the liver belongs to wood, corresponding to sour taste, green, spring, eastern, etc; Heart belongs to fire, corresponding to bitterness, red, summer, southern, etc; The spleen belongs to the earth, corresponding to sweet taste, yellow color, long summer, central color, etc; The lungs belong to gold, corresponding to spiciness, white, autumn, and the West; Kidney belongs to water, corresponding to salty, black, winter, northern, etc. These theories provide important guidance for traditional Chinese medicine health preservation and disease prevention and treatment.
在《素问·阴阳应象大论》中，作者首先阐述了阴阳五行学说的基本概念。指出阴阳是宇宙中相互对立、相互依存的现象，五行则是构成宇宙的基本要素。同时，作者还详细描述了五行生克规律及其在人体内的具体应用。例如，肝属木，与酸味、绿色、春季、东方等相应；心属火，与苦味、红色、夏季、南方等相应；脾属土，与甘味、黄色、长夏、中央等相应；肺属金，与辛味、白色、秋季、西方等相应；肾属水，与咸味、黑色、冬季、北方等相应。这些理论为中医养生和疾病防治提供了重要的指导。