The proposition of “nourishing yang in spring and summer” is taken from “The Emperor’s Inner Classic – Suwen – The Great Treatise on the Regulation of the Four Temperaments”, which says: “The yin and yang of the four seasons is the root of all things. Therefore, the sage nurtures yang in spring and summer, and yin in autumn and winter, in order to follow its roots, so that it can sink and float with all things in the door of growth”. This sentence contains two layers of meaning, one is to say that people live in nature, and the growth of everything in heaven and earth, strong and old has been, closely related, that is, heaven and man accordingly; second is to say that people should follow the changing laws of the four seasons of yin and yang to maintain health. The four seasons of the year, cold and summer, nature’s yin and yang two qi in constant motion changes, manifested as spring temperature, summer heat, autumn cool winter cold, then why the ancients to put forward “spring and summer Yang” it? We often hear about yin deficiency, yang deficiency, so what is yin deficiency, what is yang deficiency, the following is a brief introduction: the so-called yin deficiency, refers to the human body essence, blood, fluid and other tangible material deficiency, the five organs have yin deficiency, of which the kidney yin is the essence of all yin. Yin deficiency has a moistening and nourishing effect on the body. Yin deficiency is characterized by internal heat, manifested by irritable heat in the five hearts (chest, both hands and feet), hot flashes of bone steam, lethargy and night sweats (waking up sweating at night), redness and fire on the face; Yin deficiency is characterized by dryness of the throat and mouth, dryness of the eyes, red tongue with little moss, and weak pulse. Yang deficiency refers to the diminished or weakened function of Yang Qi in the human body and insufficient heat. Yang Qi has a warming effect, so Yang deficiency is cold outside; Yang Qi also has a pushing effect on the human body, pushing the normal operation of blood, if Yang Qi is insufficient, blood flow will be slow and blood stasis will occur; Yang Qi has a solidifying effect on blood and fluids in the human body, Yang Qi deficiency will cause leakage of blood, blood in stool, etc., and loss of solidifying effect on fluids will cause For example, when a person is frightened, he or she may become incontinent, which is due to the fact that in Chinese medicine, “fear leads to the lowering of Qi”, and Qi cannot be properly stored; or there may be more saliva and nasal discharge; the role of fixation is also reflected in maintaining the normal position of the organs. The role of consolidation is also reflected in maintaining the normal position of the organs, such as insufficient Yang Qi in the spleen, which can lead to gastric prolapse, uterine prolapse, prolapse, etc. Yang Qi also has the role of qi-chemistry, which is even more important. The normal functioning of all internal organs is based on the normal functioning of qi-chemistry. For example, if there is a disorder in the qi of the bladder, urination will be abnormal, and the poor urination caused by prostate enlargement in elderly men is considered by Chinese medicine as a disorder in the qi of the bladder. There are also metabolic syndromes, such as obesity, hyperlipidemia and hyperglycemia, which are caused by the dysfunction of the spleen and kidneys to transform sugar, fat and other nutrients properly, and should be treated by regulating the spleen and kidneys. Yang deficiency in the human body is mainly due to deficiency of heart, spleen and kidney yang, among which kidney yang deficiency is also called life fire deficiency, because kidney yang is the essence of all yang in the human body. The manifestations of Yang deficiency are 1) fear of cold, cold extremities, 2) poor digestion, poor digestive power, 3) lack of energy, drowsiness and weakness, 4) sweating when moving, easy to catch a cold, 5) pale and fat tongue, or teeth marks, 6) sunken and thin pulse, cold skin. Causes of Yang deficiency: mostly due to congenital deficiency or loss of nourishment, including improper diet, fatigue or disease damage to Yang, or excessive use of bitter cold drugs. Yang Qi is the driving force of life. The Su Wen – The Treatise on Anger and the General Sky says: “Yang Qi is like the sky and the sun, if you lose your place, you will lose your life and not manifest”. Yang turns into gas, and yin takes shape. Without yin, there is no root for yang, and without yang, there is no way to transform yin, so the transformation of yin must depend on yang. The innate qi, also called yuan qi, is the fire of life and is hidden in the kidneys, also called the life fire, which is extremely valuable. If the fire is extinguished, life is over. Therefore, protecting Yang Qi and reducing its loss is an important mystery of anti-aging. Sun Simiao in the “Thousand Gold Formula” said: “people over 50 years old, Yang Qi day decay, loss and day to day, the heart force gradually recede, forget the front of the loss, Xingju laziness, planning and teaching are not satisfactory. The eyes and ears are unstable, …… everything is scattered, the heart is bored, forgetfulness and anger, the temperament is different, the diet is tasteless, the bed is restless ……”. Therefore, it is important to take care of Yang Qi and strengthen it. This is exactly what Taoism says: “If the Yang essence is strong, you will live a thousand years” and “If the Yang essence is in, you will be able to live”. Of course, we should not understand the importance of Yang Qi one-sidedly, as Yin and Yang are not isolated and static, but interdependent, growing and transforming. Balance between yin and yang is the basis of health. Why do we need to “nourish yang in spring and summer”? Spring and summer nourish yang reflects the principle of Chinese medicine to adapt to the time and place. In spring and summer, the natural yang energy rises and develops, so it is advisable to follow the times and nourish the body, so that the body is full of yang energy and energetic. In spring and summer, people go outdoors and increase their activities, especially in summer, when the heat is intense and sweat increases, resulting in too much Yang Qi being released with sweat, which leads to a deficiency of Yang Qi in the body; or excessive craving for cold food and excessive internal cold due to heat prevention and cooling; therefore, ancient medicine proposes the principle of “nourishing Yang in spring and summer” on the basis of the corresponding view of heaven and man. Therefore, the ancient medical science based on the view that the heaven and the people correspond to each other, put forward the principle of “spring and summer nourish the yang”, such as Wang Bing, “Yellow Emperor’s Classic of Internal Medicine Su Wen Note”, “eat cold in spring, eat cold in summer, to nourish the yang”, Zhang Zhicong, “Su Wen Collected Notes”, “spring and summer, the yang Sheng outside and deficiency in the interior, so the sage spring and summer nourish the yang… …to follow its key. …to cultivate from its main”, Yang is the driving force of Yin, without Yang, Yin can not be born. So spring and summer nourish Yang in order to promote the collection of Yin in autumn and winter. This shows that it is very important to nurture Yang in spring and summer. The Su Wen – Four Qi Tuning Shen Da Lun says: “Spring March, this is called hair Chen, heaven and earth are born, everything to glory, night sleep and early rise, wide walk in the court, be hair slow shape, in order to make the Zhi Sheng, born but do not kill, give but do not take away, reward but do not punish, the spring gas should be, the way to nourish life.” In the spring, everything revives and comes to life, and the yang energy of nature rises and develops, so the yang energy of the human body also needs to follow the nature and spread outward. When spring returns to the earth, the weather gradually warms up, the air is humid, so that the skin coup gradually stretches, the circulatory system strengthens, the blood supply at the end of the skin increases, the secretion of sweat glands also increases, the load on the organs increases, while the blood supply to the brain center is relatively insufficient, there will be physical drowsiness, drowsy feeling, commonly known as “spring sleepy”. You should go to bed late, get up early, go for a walk in a wide courtyard after waking up, or blend in with nature, go hiking and enjoy flowers, and spread out your hair and loosen your clothes to keep your body from being tied up. Especially the elderly, because of their advanced age, have some chronic diseases, so they should adhere to this method of health care. Spring is the first time the Yang Qi is born and not yet Sheng, Yin Qi is first reduced and not yet decayed, the weather changes greatly at the first cold and first warm, so spring should pay attention to warmth and cold, Gu protect Yang Qi, according to the weather cold and warm add and subtract clothing, not because the winter has passed suddenly reduce clothing, so that the sudden attack of cold, the correct approach is to gradually reduce wearing heavy clothing. This is also the reason why the people often say “spring cover and autumn freeze” in the spring should be covered. The “Su Wen – Four Qi Tuning Shen Da Lun” said: “Summer in March, this is called the Fanxiu. Heaven and earth, everything flowers, night sleep and get up early, not tired of the day, so that the will is not angry …… so that the gas can be released, if the love of the outside, this summer gas should be, the way to feed the long”. People should sleep late and get up early, because the sun rises early in summer, the morning air is fresh, and the temperature is relatively low, sleep late and get up early can respond to the changes in nature Yang Sheng Yin deficiency, to enhance physical fitness. But late to bed and early to rise inevitably will make the sleep time reduced, so at the height of the heat at noon when the appropriate nap can avoid the heat, but also to eliminate fatigue, replenish physical strength, in order to maintain sufficient energy to put into work and study. In summary, spring is the time of Yang, summer is the most vigorous Yang season of the year, in the natural world when Yang is strong to follow the times, suitable for Yang, but also easy to raise Yang; In addition, spring and summer, people’s activities increase, sweating increases, the body tends to Yang on the surface and deficiency in the body, and people have a cold habit of eating, Yang is easy to consume, Yang is necessary to raise.