Gui Zhi Tang has the effects of relieving muscles and releasing Qi (using sweating and other methods to make the evil Qi trapped on the surface of the muscles to go out), and harmonizing Ying and Wei (making the internal and external Qi of the body smooth and in their respective roles). To make Gui Zhi Tang, boil three liters of seven liters of water over low heat and remove the dregs to obtain Gui Zhi Tang. In Gui Zhi Tang, Gui Zhi detoxifies the muscles and disperses wind-cold, while Paeoniae Alba benefits the yin and astringes the ying, and the combination of the two herbs harmonizes the ying and the wei. Ginger helps the cinnamon stick to dissolve the muscle and warms the stomach to stop vomiting. Jujube nourishes Qi, nourishes the middle, nourishes the spleen and generates fluids. The combination of ginger and jujube can promote the vitality of the spleen and stomach and harmonize Ying and Wei. Radix et Rhizoma Glycyrrhizae can benefit qi and harmonize the middle (tonifying qi, harmonizing the spleen and stomach), and harmonize various medicines (harmonizing the properties of different Chinese medicines). All of the above medicines work together to relieve muscles and release, harmonize Ying and Wei. Modern clinical practice has found that Gui Zhi Tang is often used in colds, influenza, unexplained low-grade fever, post-partum and post-disease low-grade fever, vomiting in pregnancy, erythema multiforme, frostbite and urticaria, etc., which belongs to the disharmony of Ying and Wei. Clinical application of Gui Zhi Tang should pay attention to, where the external wind-cold surface solid without sweating is prohibited, and during the period of taking the medicine prohibit eating cold, greasy things. Specific Gui Zhi Tang dosage should be taken in accordance with medical advice, do not use on their own.