It is the overall quality of body and mind formed by the fusion of human innate endowment (including heredity) and acquired life. It is reflected in the human form, structure, function, mind, ethics and ability to adapt to the environment (nature and society). It is relatively stable but dynamically adjustable during the stages of life such as fetus, childhood, adolescence, adulthood, middle and old age. Body mass is closely related to life, and we can learn more about body mass from common things in life: someone had hot pot with friends in the evening and got a bag on their face the next day. So many people eat hot pot, maybe only one person grows a bag. In summer, when blowing electric fans, one person says turn it on a little higher, and some say turn it down a little more. The same is true for food, some people eat the refrigerator to diarrhea, and some people like to eat cold things. Why does this happen? This is because there are physical differences between people. Each person feels nature differently and things respond differently. How do we classify body types? After nearly 30 years of research, Professor Wang Qi of Beijing University of Traditional Chinese Medicine, who is in charge of the National Key Basic Research and Development Program (973 Program), has synthesized the theories of ancient and modern Chinese and foreign schools of thought and conducted a lot of epidemiological surveys, and finally developed the most mature “nine points method” The research results have won the second prize of the National Science and Technology Progress Award, which is an effective tool for “treating the disease before it happens” in Chinese medicine. This research result won the National Science and Technology Progress Award and was valued by the Ministry of Health and the State Administration of Traditional Chinese Medicine as an effective tool for treating the disease.