It is mainly harvested around the summer solstice, so it is called Semen. Its main functions are to dry dampness and dissolve phlegm, subdue vomiting, and dissipate lumps and knots. It is generally used for coughing and wheezing with phlegm, dizziness and palpitation with phlegm, dizziness with wind and phlegm, headache with phlegm, vomiting and regurgitation, stuffiness in the chest and epigastrium, and plum kernel gas. When used raw, it can treat carbuncles and swellings. In the respiratory system, it has anti-cough and expectorant effects; in the digestive system, it has antiemetic, emetic and anti-ulcer effects; in the hepatobiliary system, it can promote the secretion of bile; in the circulatory system, it has anti-arrhythmic and anti-coagulant effects. In recent years, it has been found to treat tumors, and it is applicable to esophageal cancer, gastric cancer, and lymphoma. According to its concoction method, it can be divided into raw Semen, Qing Semen, Jiang Semen and Fa Semen. Their effects are slightly different, with raw Semenaxia subduing swelling and dispersing nodules, Qing Semenaxia drying dampness and resolving phlegm, Jiang Semenaxia lowering rebellion and stopping vomiting, and Fuxianxia harmonizing the stomach and drying dampness. The application can be chosen reasonably according to the different functions.