Huangdi Neijing says: "Spring is March, which means Chen Sheng, Heaven and Earth are born, and everything is glorious". In spring, the yang rises and everything grows. At this time, the human body adapted to the weather, and the yang in the body began to sprout and extend from the dormant state. Spring belongs to five elements. According to the theory that the five internal organs should respond to the four seasons, the liver should respond to spring, and the body yin should replace the yang. The liver has the function of regulating qi, dredging and regulating the qi of various organs and tissues in the whole body to maintain the balance of the body. Liver is closely related to human spirit, digestion and absorption, qi and blood circulation and water and fluid metabolism. The liver can regulate human emotions, maintain qi and blood circulation and water-liquid metabolism through the functions of relieving diarrhea, promoting hair growth and excreting. Huangdi Neijing said: "The liver belongs to wood, and spring flourishes. The qi of spring hurts the liver. " Because spring qi passes through the liver, spring health preservation conforms to the characteristics of natural rising and comfort. At this time, the liver qi is vigorous and rises. In spring, the liver is prosperous, so it is necessary to regulate the liver qi. Whether the excretion function of the liver is normal or not plays a regulating role in the ascending and descending balance of qi-moving. In order to make qi flow smoothly, rise and fall properly, harmonize qi and blood, and dredge meridians, we must pay attention to the relaxation of liver qi to achieve the health care purpose of nourishing the liver and strengthening the body in spring.

Mr. Zhang zhen, a master of traditional Chinese medicine, founded an academic school of traditional Chinese medicine in Yunling, and advocated that the core theory of TCM health care diagnosis and treatment is yin and yang, qi and blood, and qi and blood harmony. By regulating Qi-flowing, Qi-flowing and Yin-flowing can be relaxed, thus maintaining the normal operation of Qi-flowing, balancing Yin-flowing and Qi-flowing in the body, and restoring abnormal Qi-flowing to normal state, thus maintaining the health of the body. Su Wenzhi's Theory of Truth and Expressiveness points out that "sparse qi and blood, harmonize them, and lead them to harmony." The highest state of nature is peace in a state of mutual movement. Zhang Lao believes: "The main causes of diseases are pathological factors such as imbalance of yin and yang and imbalance of qi." . Under the guidance of Zhang Lao's theory of regulating liver qi, we should pay attention to regulating liver qi, nourishing blood, softening liver and regulating liver qi in spring to achieve good effect of nourishing liver in spring.

According to the viscera image theory of TCM, the liver belongs to wood in the five elements, and it is sorted into wood, fire, earth, gold and water according to the five elements of TCM. The liver is in the first place, and the gallbladder is attached to the liver. It's like a year when the yin fades and the yang grows, the spring breeze is renewed, and the branches and leaves of trees sprout and stretch. The ancients imitated natural phenology and human physiology and thought that the liver had the instinct of ascending, stretching, reaching, relaxing and hating, which could relax the qi in the body and maintain normal and smooth operation. Therefore, the regulation of liver on systemic functional activities is realized by regulating qi. To nourish the liver in spring, we should pay attention to regulating the liver qi. By regulating the liver qi, the spring will be smooth and the purpose of nourishing the liver will be achieved. Mainly concentrated in the following aspects:

Pay attention to regulating mental emotions: the mental and emotional activities of human body are based on the essence and functional activities of five internal organs, and the functions of five internal organs depend on the regulation of qi and the coordination of functional activities of viscera, which are manifested as mental pleasure and emotional comfort; When the liver loses its function, abnormal mental and emotional changes will occur. Loss of liver qi, stagnation of liver qi, manifested as depression; Excessive catharsis and hyperactivity of liver-qi often lead to hyperactivity, which all lead to the liver governing the discharge and the dysfunction of patients.

Pay attention to the maintenance of qi and blood circulation: the liver releases qi, regulates the whole body's qi, and promotes the whole body's qi to move without stagnation and disperse without depression. The theory of visceral diseases due to blood syndrome says: "The liver belongs to wood, and the wood is full of qi, so if it is not depressed, the blood vessels will be smooth." Therefore, if the function of the liver governing the discharge is normal, the qi will be regulated smoothly, the qi and blood will be accessible, the meridians will be unblocked, and the functions of zang-fu organs will be harmonious. If the liver's function of controlling diarrhea is not as good as dispersing ascending hair, the qi is depressed; If there is too much drainage, the liver qi will fluctuate up and down.

Promote the digestion, absorption and transport of spleen and stomach: the promoting effect of Shugan Jieyu machine on the transport and transport function of spleen and stomach is mainly reflected in two aspects: First, it assists spleen in ascending stomach and descending stomach. The liver governs qi, which helps the qi of the spleen and stomach rise and fall. Only when the spleen rises and the stomach falls can the digestion, absorption and excretion of diet proceed normally. The second is to secrete and excrete bile to help food digestion. The theory of viscera diseases due to blood syndrome says: "The nature of wood is mainly to relieve qi, which makes people eat qi in the stomach, relying entirely on the qi of wood to relieve qi, while Shui Gu is the essence." If the liver loses the function of transforming qi, the qi is out of balance, and the spleen and stomach are involved, it will cause digestive dysfunction. Nausea and vomiting, burping, belching, epigastric fullness, bowel sounds and diarrhea may occur. If the liver is not excreted smoothly, which affects bile secretion and excretion, hypochondriac discomfort, bitter taste and jaundice will occur.

Auxiliary water-liquid metabolism: the water-liquid metabolism of human body is closely related to the release of liver. The operation of water and liquid depends on the promotion of gas. Only when the air machine is adjusted smoothly can the water and liquid maintain normal distribution and excretion, that is, when the air machine is pneumatic, the water will move. If the liver discharges, it will be blocked, and if the qi does not flow, the water-liquid conduction will be blocked.

Regulating reproductive function: In human reproductive function, women's menstruation and men's ejaculation are closely related to the function of soothing the liver and relieving depression. The liver relaxes and discharges smoothly, and the second pulse is helped by it, so the pulse is smooth and the pulse is too strong. The menstruation comes at the right time, which makes the pregnancy and delivery smooth. Men's semen is sealed in the kidney and excreted in the liver. If the liver qi is adjusted smoothly, the semen will be discharged smoothly.

Nourishing liver in spring is the key. According to Zhang Lao's theory of regulating qi, through the functions of relieving, promoting and excreting the liver in spring, we can regulate human qi, harmonize yin and yang, smooth the operation of qi and blood, regulate human emotions, and maintain the circulation of qi and blood and water metabolism, so as to achieve the purpose of nourishing the liver and strengthening the body in spring.