The effects and functions of Aster are to moisten the lungs and lower the qi (nourish the lungs and bring down the upwardly charged lung qi), resolve phlegm and relieve cough. It should be taken with caution for those with dry cough due to Yin deficiency. Cold, raw and cold, spicy and greasy foods are contraindicated. Aster can be used clinically for phlegm and asthma, new and prolonged cough, laborious cough and hemoptysis. In the treatment of prolonged cough, cough and phlegm, can be used with Platycodonopsis, Bacopa monnieri; in the treatment of yin deficiency cough or coughing up blood is often used with Bei Mu, Zhi Mu, Agaricus blazei. This medicine is hard and descending, warm and moist, not dry, long for moistening the lungs and lowering the qi (moisturizing the lungs, so that the lung qi that rushes upward will descend), pungent to open up the lungs and resolving phlegm and turbidity to stop coughing. It can be used to treat coughs regardless of external and internal injuries, cold, heat, deficiency or solidity, and is most suitable for patients with congested lung qi and cough with phlegm. It is best used in patients with congested lung qi and cough with phlegm. When using this medicine, it should be used raw for external coughs and roasted for internal coughs. Chinese herbs in the use of the need for evidence-based treatment, in addition, for the yin deficiency of dry cough should be taken with caution, there are also some contraindications: for example, pregnancy and lactation, also need to be taken with caution, but also can not eat cold, cold, spicy and greasy food, so it should be used under the guidance of a professional Chinese medicine practitioner.