Bai Qian is a very common herb, also known as Shui Yang Liu, goose Bai Qian, grass Bai Qian. Effects: Very good expectorant medicine, and has a lowering of lung gas to calm cough and asthma, eliminate phlegm, cough and other effects. Efficacy: 1, cough and phlegm, white before pungent slightly warm, mild medicinal properties, warm can dispel cold, because of its warm but not dry, into the lungs, can stop cough and phlegm, whether cold cough or hot cough, external internal injuries, new cough long cough, white before can play a very good effect. 2, diarrhea lung asthma, because the white front bitter pungent and slightly warm, the main into the lung meridian, clearing lung heat, can play a diarrhea lung asthma effect.