The ancient book Compendium of Materia Medica also recorded in detail the difference between orange peel and orange peel and its efficacy. If it is used to regulate the stomach, the white part of the orange peel is left. If it is used for relieving qi and resolving phlegm, the white part of the orange peel is removed, and the orange peel with white part is also called orange peel. The function of orange peel is stronger than that of old orange peel, and it also has the function of dispelling cold, which is suitable for patients with exogenous cold and cough and phlegm.