According to Chinese medicine, the state of health should be “yin and yang secret”. The Yin energy of the body is calm and the Yang energy is fixed, and the two regulate each other to maintain their relative balance, which is the basic condition for normal life activities. This balance is the result of the interaction of various factors inside and outside the body, and the harmonious unification of the internal and external environment under the body’s own regulation. If the balance can be maintained, all systems of the body function normally and are healthy and energetic. If various factors from the internal and external environment cause the body’s qi, blood, yin and yang to be biased and lose their proper regulation, an imbalance in the internal and external environment will gradually occur. This change from balance to imbalance is a dynamic process from healthy to unhealthy, and the state of “sub-health” is a stage in this process. 1. Sub-health is an important manifestation of “unwellness”. Chinese medicine has an early understanding of sub-health, and ancient medical sages have long believed that the purpose of medicine is to “eliminate illnesses before they become acute” and to “help the inferior to get well”. “(Su Wen – Preface), followed by the treatment of diseases. Here the so-called “not yet”, that is, when there is no significant signs of disease; the so-called “inferior”, that is, deficient or less healthy, but not necessarily sick, and these, precisely what people call sub-health state. Traditional Chinese medicine advocates “treating the disease before it happens”, paying great attention to the harmony and unity between human beings and nature, the environment and society, the influence of emotion and spirit on human beings, emphasizing a holistic concept, treating with evidence, and advocating “prevention before illness” and “the unity of heaven and man” and “the unity of the world”. It also emphasizes the holistic concept, diagnosis and treatment, and advocates medical and health care ideas such as “prevention before illness” and “unity of heaven and man”, “unity of form and spirit” and “combination of movement and stillness”. These theories are precisely in line with the changes in the concept of human health and the transformation of the medical model. Therefore, the idea of “treating the disease before it happens” in Chinese medicine has unique advantages for the prevention and treatment of sub-health. On the one hand, it can restore the body to a healthy state by nourishing the mind and strengthening the body; on the other hand, it can intervene in subhealth at an early stage to prevent its transformation into a disease. The essence of Chinese medicine is “Discriminative Treatment”, which can better solve the confusion of modern subhealth treatment. Because sub-health is a comprehensive manifestation, TCM can solve a series of mental and physical imbalances of sub-health from a holistic perspective through discriminative treatment. Among the complex symptoms of sub-health, the core pathogenesis is “loss of nourishment of the mind and spirit, qi deficiency and liver depression”, and by grasping this main contradiction, we can come up with a treatment method. The occurrence of sub-health is the result of long-term, chronic, multiple internal and external adverse stimuli. Most of the symptoms are memory loss, insomnia, sleeplessness, fatigue and other symptoms of loss of mental and spiritual health. Fatigue is another prominent manifestation of sub-health, which is very consistent with the evidence of Qi deficiency in TCM. And mental and emotional abnormalities are consistent with the liver depression pathogenesis in TCM. Therefore, the occurrence and development trend of sub-health can be summarized by a basic pathological mechanism, which can reflect the overall characteristics of sub-health. 3, physical factors are closely related to the occurrence of sub-health “Spiritual pivot – the beginning of all diseases” said: “wind and rain cold and heat shall not be deficient, the evil can not hurt people alone, pause, when a storm and not sick, cover no deficiency, so the evil can not hurt people, this must be because of the wind of the deficiency evil, and its body shape, two deficient phase to get, is the guest of its shape, two real phase of the crowd of flesh firm.” That is, just like the wind and rain, cold and heat, these Chinese medicine speak of “false” evil, is not to make people sick, only when the body itself is also weak, two “false” together, will get sick. This means that the state of the body’s own constitution is the key to the onset of disease and, likewise, the key to the development of sub-health. The reaction to evil spirits (disease-causing factors) and the onset of disease vary from body to body. The body is strong, feel the external evil is not to the onset of disease; while the body is weak, the slightest wind blowing will not work. Therefore, the strength of the physique, to a large extent, determines the health status. Similarly, after being stimulated by some disease-causing factors, whether subhealth is formed, whether it can develop after formation, or whether it can heal on its own, depends largely on the constitution. There are many manifestations of subhealth, but there is always one type of manifestation related to one type of constitution. For example, people who are usually deficient in yang qi will have a lack of warmth in their limbs, sweating easily, hair falling easily, and loose muscles; people who are usually deficient in yin qi will have a flushed face, a feeling of baking heat, dry eyes, dry mouth and throat, and dry skin; people with phlegm and dampness will have a series of symptoms such as a sticky or slightly sweet mouth, sticky sweat, unpleasant limbs or a heavy body, and a lot of phlegm. Among the nine types of constitution, qi deficiency constitution is most closely related to subhealth. People with qi deficiency constitution are more prone to subhealth. This is because, according to Chinese medicine, vital energy has a role in the human body to promote the normal operation of the vital organs and blood and resist external evil. The lack of vital energy due to various reasons often affects the health of the body. When the body loses power to function, the defense function decreases. The manifestations of qi deficiency largely correspond to the symptoms of subhealth, and people with this constitution will develop subhealth with the slightest discomfort in their lives. In second place is the qi-depressed body. Qi deficiency is the weakening of the body’s qi, while qi depression is the obstacle to the operation of the body’s qi, when the qi can not properly lift in and out and gathered in the internal, then the formation of “qi depression”. According to Chinese medicine, qi depression is mostly caused by depression and boredom, mood discomfort, and is closely related to the liver. People with qi-depressed constitution mostly show abnormal emotions, such as sentimentality, sullenness, impatience and irritability. If a person with qi-depressed constitution has subhealth, it is mostly psychological subhealth.