Tangerine peel is a red tangerine produced in Xinhui, Guangdong. It is harvested when the immature tangerine peel is still green. If the chemical composition of the fully mature tangerine peel changes, the medicinal effect will be reduced. After peeling the tangerine peel, open it and dry it in the sun. , stored in a ventilated and dry place for more than three years is called tangerine peel. It has the effect of resolving phlegm and regulating qi, and is also used daily for cooking and seasoning.