”Pungent, sweet and warm, with thin, rising and floating Qi. Enters the Taiyin Lung and Sun Bladder meridians. Warming the meridians and opening the veins, inducing sweating and relieving the muscles. It is used for treating headache from wind and spontaneous sweating from stroke, harmonizing the Ying and Wei, so that the evil comes out from sweating and the sweating stops. Also treats gout in the hands and feet, and wind in the dampness.” This “materia medica preparation” of the description of the cinnamon branch, the nature and taste of the main treatment are all complete. In this way why is called warming Yang Li Shui words Gui Zhi? See below for details. Gui Zhi, sex taste pungent, sweet and warm, gas thin rise floating. The materia medica Feng Yuan also contains: “pungent, sweet, slightly warm, non-toxic.” The five elements match the five flavors, and the pungent flavor enters the lung. Its warm nature and thin, ascending and floating qi can help the lung qi to be dispersed, remove the wind and cold evil qi on the surface, and harmonize the Ying and Wei. Therefore, the ancient formula “Gui Zhi Tang”, with Gui Zhi as the ruler, is complemented by peony, licorice and ginger and jujube to treat the evidence of solar stroke. Gui Zhi is the young branch of the plant Cinnamomum cassia, and the branch leads to the limbs. The Materia Medica Hui Yan said: “Gui Zhi, disperses wind and cold, expels surface evil, generates evil sweat, stops coughing, and removes wind pain between the limbs. Although the smell is not away from the pungent heat, but the body belongs to the branch, only can be dispersed between the skin and hair muscle couples, parade arm and knee limb joints.” Its pungent and warm nature can warm the Yang and open the veins, help Yang Qi pass in the limbs and hundred hydroxylamine, dispel wind and dispel cold, in addition to wind and cold damp paralysis, can cure the limbs and joints cold damp paralysis pain. The “Materia Medica” notes that Gui Zhi can cure spontaneous sweating, but what kind of spontaneous sweating can be treated? The main treatment for spontaneous sweating is Gui Zhi Gan Cao Tang. Sweat is the fluid of the heart. If the heart is deficient in yang, the yin and yang are not in harmony and the yin is not guarded internally, spontaneous sweating will occur. Gui Zhi can help to warm the heart yang and open the veins, so that the heart veins can be opened and the heart yang can be consolidated internally, then the spontaneous sweating can be stopped. There is also roasted licorice soup as evidence. Wind and cold directly into the internal organs of the central jiao, but see the stomach cold abdominal pain, like warmth, like to press, Zhongjing party small Jianzhong Tang to it. Small Jianzhong Tang, formula with cinnamon, ginger, syrup, peony, etc. together, can warm the middle and disperse the cold, ease the pain. If it does not pass, it hurts, and if it does not glory, it hurts. For stagnation of blood vessels and stagnation of yang energy leading to dysmenorrhea and menorrhagia, warming Menstruation Tang can be given. It has the effect of warming the menstruation and dispersing cold, invigorating the blood and opening the blood vessels, dispelling blood stasis and relieving pain. Gui Zhi enters the lung meridian of the hand Tai Yin and the bladder meridian of the foot Sun, which can enter the internal organs of the lung of the hand Tai Yin and the bladder of the foot Sun. The lungs are the source of water; the bladder is the official of the state capital. Is it possible to say that Gui Zhi can benefit water? How does Gui Zhi benefit water? It is into the bladder meridian, warming the meridian, Yang Qi can be filled; kidney Yang is sufficient, gasification has a source, the waterway can be passed, it is said that Gui Zhi can warm Yang gas water. The ancient and modern famous formula Wu Ling San, the main treatment of the sun water storage evidence. To sum up, Gui Zhi can pass through the Yang of the exterior and interior, harmonize the Ying and Wei; can pass through the Yang of the limbs, pass through the joints; can pass through the Yang of the organs of the upper, middle and lower jiao, help Yang to transform Qi. So far, it can be called warm yang and water words Gui Zhi carry on! Modern medical knowledge of cinnamon branch mainly from basic experiments, its role can be summarized as antibacterial and antiviral effects; central nervous system effects; diuretic effects; anti-inflammatory and immunomodulatory effects; vasodilator effects; anti-tumor effects. 1, antibacterial and antiviral effects 1.1 antibacterial effects Experiments found that cinnamon extract cinnamon alcohol can have a significant inhibitory effect on a variety of pathogenic microorganisms such as Escherichia coli, Staphylococcus aureus, Shigella, Pneumococcus and Aspergillus. 1.2 Antiviral effect Basic experiments found that the decoction of Cinnamomum officinale had some inhibitory effect on influenza virus and orphan virus. Both the extract and the decoction of Cinnamomum officinale have been confirmed to have certain antibacterial and antiviral effects, but they are limited to laboratory studies and have not yet been applied in the clinical setting. However, based on the traditional theory of Chinese medicine and the clinical effectiveness of the classical formula Gui Zhi Tang in treating solar diseases, we have reason to expect further research results. 2. Central nervous system effects The central nervous system effects of Gui Zhi are diverse and contain four aspects: sedation, anticonvulsant, antipyretic, and analgesic. However, experiments have shown that its various effects are weak and have not yet shown a trend of having obvious effects. 3, diuretic effect Whether the application of Gui Zhi extract, or the application of Wu Ling San extract for animal experiments, have shown a significant diuretic effect, but its specific pharmacological mechanism of action is not clear, the current study considered the pump theory, pending further research to confirm. 4, anti-inflammatory and immunomodulatory effects Studies have shown that the volatile oil of Cinnamomum cassia has certain anti-inflammatory effects and can reduce the inflammatory response of the respiratory system to a certain extent; and some studies have shown that the main pharmacological component of Cinnamomum cassia can promote the release of histamine in humans; in nephritis studies it is seen that Cinnamomum cassia infusion has certain anti-allergic effects. 5, vasodilating effect The vasodilating effect of cinnamon branch is mainly manifested as dilating peripheral blood vessels, promoting blood flow to body surface vessels, increasing peripheral blood volume, reducing heart load and increasing body surface heat dissipation capacity to a certain extent. 6.Anti-tumor effect The famous formula of Gui Zhi Fu Ling Pill is an important formula for harmonizing Qi and blood, resolving blood stasis and eliminating Y. Modern clinical research has widely used it in a variety of benign and malignant tumors in gynecology and gastrointestinal tumors, and its clinical efficacy is definite. Modern studies have found that Gui Zhi extract has significant anti-tumor efficacy, but its anti-tumor pharmacological basis and target of action are not yet clear, and will become one of the key elements of future research.