There are more Chinese medicines with expectorant effect, the common ones are Hanxia and Tiannanxing. 1. Half-summer is pungent in taste, warm in nature and poisonous. It has the efficacy of drying dampness and resolving phlegm (expelling dampness by drying dampness and dissolving phlegm), lowering the rebelliousness and stopping vomiting (preventing the upward rush of gastric qi and stopping vomiting), and eliminating plaque and dispersing knots (eliminating the lumps in the body), and it can be used for treating damp phlegm and cold phlegm, coughing with a lot of sputum, wind-phlegm and dizziness, and vomiting phlegm and saliva. This product should not be used with Chuanwu, Prepared Chuanwu, Caowu, Prepared Caowu, Radix et Rhizoma Polygoni Multiflori; caution is advised in the internal use of raw products. Adverse reactions are not clear. 2. Tiannanxing is bitter, pungent, warm and poisonous, with the effect of drying dampness and resolving phlegm, dispelling wind and stopping spasm (by dispersing wind to treat spasm and other symptoms), dispersing knots and subduing swellings, it can be used for treating coughs and wheezing caused by phlegm-dampness and externally used for treating carbuncles and swellings, and snake and insect bites. If there is any discomfort, it is recommended to consult a hospital in a timely manner, under the guidance of a professional physician to avoid adverse consequences.