Guizhi (Latin: Ramulus Cinnamomi, Gui Xin) is a Chinese herbal medicine, is Lauraceae evergreen laurel (cinnamon, Cinnamomum cassia) shoots. Produced in Guangxi, Guangdong, Yunnan, Fujian and other places, especially in Guangxi as much. Spring and harvested, dried or dried, sliced raw use. Gui: spicy, sweet, warm. There relieving cold, warm through the pain, to help yang qi function. For exogenous cold, fever, chills, cold arthralgia, amenorrhea.
Chemical composition: The product contains volatile oil, the main component of cinnamic aldehyde and so on. Also still contain phenols, organic acids, polysaccharides, glycosides, and tannins and other coumarin. Abdominal pain, dysmenorrhea, Zhengjia agglomeration, chest stuffiness pain, palpitations, cough and phlegm, such as urination.

"Gui" is a cold medicine. Guizhi is cinnamon tree branches, cinnamon is the bark of the cinnamon tree, this is the same root, but their potency is not much different. Guizhi best at relieving colds, while cinnamon is longer than the warming yang. Chinese herbal books "do not record" in the records, Gui Xing Xin Wen, sweet, heart, lung, bladder, With sweating of the table, the treatment of colds cold, warm the sun, cold pain, through the yang qi, meridians blood stasis and other functions. Exogenous cold cold: if accompanied by a cold sweat, with Gui and peony with the use, to reconcile business health, diaphoresis, such as Gui Zhi Tang; if no cold sweat, often with ephedra Guizhi with the use, in order to achieve divergent cold, Xuanfa lung effect. Guizhi treat palpitations: Gui can warm the sun, often with licorice, Codonopsis, Radix with the use, treatment due to heart palpitations Yang caused heartache, pulse knot generation. Modern pharmacological studies confirmed the role of heart rate has been improved Guizhi, and Astragalus, Salvia, licorice components of the basic side, can be used to treat bradycardia. Guizhi treatment phlegm disorders: Gui yang qi can pass, can and Poria, licorice with the use, as Lingguizhugan Treated body who have phlegm.
Guizhi treat pain cold: Cold Blood type menstrual pain, Gui can and Angelica, with the use of cold pain Evodia, warm meridians.