The Chinese medicine “Aster” does not exist, the correct name should be “Aster”, is the root and rhizome of the plant Aster, family Asteraceae. Aster is pungent, bitter and warm in nature, and belongs to the lung meridian. It has the effects of moistening the lungs and lowering the qi (moisturizing the lungs and making the upward lung qi descend), eliminating phlegm and relieving cough. It can be used in the treatment of various coughs, itching throat, dyspnea, upward movement of lung qi, hemoptysis, and dysuria (unsmooth urination). Its adverse reactions and contraindications are not clear. If the treatment of wind-cold offending the lungs, cough, itchy throat, sputum unpleasant, can be combined with Jingbaidi, Platycodonopsis, Momordica charantia and so on. For the treatment of phlegm-heat obstruction of the lungs, cough with excessive sputum, chest fullness (chest distension and discomfort), shortness of breath, dry throat and itchy throat, it is often combined with Hua Tangerine Hong, Gua Pou Zhou Pi, Fa Han Xia, and so on. If there is any discomfort, please consult a doctor in time and use the medicine under the guidance of a professional physician to identify the symptoms.