The principle of winter tonic is that deficiency is tonic. Deficiency is a general term for a variety of chronic deficiency symptoms that are mainly caused by deficiencies in the internal organs, Qi, blood, Yin and Yang. Chinese medicine will be divided into different types of deficiency, such as qi deficiency, blood deficiency, yin deficiency, yang deficiency, qi-yin two deficiencies, qi-blood two deficiencies, yin-yang two deficiencies, and should be combined with different internal organs for identification. To avoid “no deficiency indiscriminate tonic” or “deficiency not into tonic” to avoid harmful side effects to the body. Deficiency evidence includes deficiency evidence due to congenital deficiency and weakness; deficiency evidence of the elderly due to the decline of the function of the internal organs; deficiency evidence of chronic diseases such as stomach disease, liver disease, cardiovascular disease, asthma, joint pain, etc. caused by prolonged illness; deficiency evidence of major diseases such as tumor, myocardial infarction or radiotherapy, postoperative, postpartum, etc. The common symptoms of Qi deficiency are: fatigue, dizziness, laziness, spontaneous sweating, movement, cold, exacerbation after exertion, pale tongue, weak pulse. Clinically, it is classified as heart qi deficiency, spleen qi deficiency, stomach qi deficiency, lung qi deficiency, kidney qi deficiency, heart-lung qi deficiency, liver-biliary qi deficiency, and guard qi deficiency. Qi deficiency can be used to benefit the vital energy of Chinese herbs, commonly used are: ginseng, ginseng, astragalus, yam, atractylodes, poria, roasted licorice, Wu Wei Zi. Foods used to nourish Qi include: soybeans, black beans, peas, shiitake mushrooms, dates, lotus seeds, chestnuts, peanuts, lychees, glutinous rice, lean meat, carp, eel, syrup, etc. 2, blood deficiency The common symptoms of blood deficiency include: no color or shriveled face, pale lips and nails, eyelids, dizziness, dry eyes, dry hair, dry skin, palpitations, insomnia and forgetfulness, numbness of the limbs or extremities, unfavorable joint flexion and extension, women can also appear menstruation, light color, late menstruation, amenorrhea, infertility and other symptoms. The clinical classification of liver blood deficiency, heart blood deficiency and other evidence. Those with blood deficiency can use herbs to nourish blood and nourish qi and yin, commonly used are: angelica, rehmannia, chuanxiong, astragalus, white peony, aconite, wolfberry, he shou wu, etc. Foods and medicines used to nourish the blood include: cinnamon, black fungus, black sesame, hen, iron-rich fresh vegetables, carrots, ham, beef, lean pork, peanuts, etc. 3.Yin deficiency The common symptoms of Yin deficiency include: bone steam and hot flashes, fever in the hands and feet, night sweating, sleeplessness, red cheekbones, emaciation, dry mouth and throat, red tongue with little coating, and fine pulse. Clinically, it is divided into heart yin deficiency, lung yin deficiency, kidney yin deficiency, liver yin deficiency, and stomach yin deficiency. Those with yin deficiency can use herbs that nourish yin, commonly used are: Radix et Rhizoma, Radix Rehmanniae, Salviae Miltiorrhizae, Semen Ginseng, Asparagus, Fructus Lycii, Lily, Dendrobium, Turtle shell gum, Turtle board gum, Cornus officinalis, White peony, etc. Foods favoring Yin are: duck, goose, turtle, tortoise, lotus root, white fungus, black fungus, etc. 4.Yang deficiency The common symptoms of Yang deficiency include: fear of cold extremities and cold, preferring to lie still and curled up, clear and long urine, downward flow of clear grain, light tongue and late pulse. Clinically, it is divided into heart yang deficiency, kidney yang deficiency, spleen yang deficiency and other evidence types. Yang deficiency can be used as a warm tonic herbal medicine, commonly used are: sapodilla, cinnamon, deer antler, cistanches, eucommia, bacopa monniera, epimedium, sequestra, bonesetter, foxglove, cuscuta, Xianmao, etc. Foods that favor Yang tonic are: mutton, dog meat, sea cucumber, onion, coriander, walnut, onion, pig kidney, cow kidney, sheep kidney, beef, quail, bird meat, tamari, shrimp, chestnut, corn, rice kernel, leek, etc.