It is a dark brown liquid with a slight fragrance and sweet taste, which has the function of clearing lung, relieving cough and resolving phlegm, and is mainly used clinically to treat cough, phlegm, chest tightness, dry and itchy throat and shortness of breath. Orange red is a traditional Chinese medicine, which is also called orange peel in ordinary life. After the orange is ripe, the white pulp is taken out and dried to be orange red, which has the effect of dispersing heat and resolving phlegm.