Chinese medicine attaches importance to the “subjectivity” of the patient, therefore, in the diagnosis and treatment of diseases, Chinese medicine always takes the patient’s sensation as the main basis for diagnosis and treatment, and the essence of the disease can be grasped by identifying the symptoms. Chinese medicine’s understanding of disease relies on the “four diagnoses” (looking, smelling, asking, and cutting), and although it can be obtained by looking and cutting, it is mainly obtained by asking and smelling, relying mainly on symptoms. Chinese medicine can treat the discomfort in the body and in the heart. This is the strength of TCM that can “treat the disease before it happens”. Chinese medicine can intervene at an early stage, and the earlier the treatment, the more effective it is. TCM relies on visual thinking and grasps the symptoms and signs as the basis for treatment. The “evidence” is a sign of belief and can be used as evidence for diagnosis and treatment. Chinese medicine firmly believes that “the internal must be shaped by the external, and the external must be rooted in the internal”, and by grasping the external signs and symptoms, it also grasps the internal changes of the disease mechanism. The World Health Organization once released data that 20% of the world’s population suffers from various diseases, only 5% of the population is healthy, and 75% of the population belongs to the subclinical state, or “subhealth”. “The term “subhealth” is a vague name for a large number of people who feel physically and mentally unwell but cannot find pathological confirmation. Strictly speaking, these “sub-healthy” people have left the state of health, and some degree of chemical or physical or biological changes have occurred in their bodies, but these changes are subtle and complex, and have not yet formed “foci”, and have not yet reached the ideal “evidence” level. It is only that these changes are subtle and complex, not yet “focal” and not yet at the desired level of “evidence”. Every year, more than 10 million people around the world die from “sub-health” and “overwork”; billions of people are physically and mentally unwell, and even in pain. The goal of TCM is to prevent diseases before they occur, which is the skill of the “master”. Because the lighter the disease, the easier it is to obtain the cure, and the easier it is to help the patient restore health. Therefore, Chinese medicine is good at observation, “the beginning of the symptoms is the birth of the Tao”, and it respects the importance of “seeing the microscopic to know the obvious” and capturing the subtle symptoms, and pursues the dynamic “treatment with the evidence”. It advocates “treating with the evidence” according to the changes of the symptoms, and “treating the disease with the evidence”. Chinese medicine is not limited to medicine, and it is not the only way to take tonics. Guiding, acupuncture, massage, psychological guidance, dietary regulation, and external application are all methods of treating diseases. Chinese medicine is rich in methods of treating disease and never relies solely on confrontation, excision and transformation. The drugs used in TCM are called “poisons” by the ancients, but with the rich theory and application experience, TCM can turn poison into medicine and waste into treasure; if the theory of TCM is abandoned, it is possible to turn medicine into poison and treasure into harm.