Hau Pu (厚朴) with Citrus aurantium has the effects of drying dampness and eliminating phlegm, regulating qi and relaxing the center (regulating the qi of the spleen and stomach), and lowering qi and removing fullness (allowing qi to flow downward to relieve the discomfort of fullness). Hau Pu is the dried root bark of Hau Pu or Hau Pu, family Magnoliaceae. It is bitter, pungent and warm in nature, and goes to the meridians of the spleen, stomach, lungs and large intestine, and has the effects of drying dampness, eliminating phlegm, and lowering the flow of Qi to remove fullness. It is clinically used to treat dampness stagnation, food stagnation (accumulation of food in the stomach due to indigestion), gas stagnation, abdominal distension and constipation, epigastric congestion, vomiting and diarrhea, and phlegm (a pathological product of impaired metabolism of water and fluid), wheezing, coughing, and other conditions. It is contraindicated for qi deficiency, fluid injury and blood withered people and pregnant women should not be taken, adverse reactions are not clear. Citrus aurantium is the dried immature fruit of the rutaceae plant lime and its cultivated varieties, its flavor is bitter, pungent, acidic, slightly cold, to the spleen, stomach meridian, has the effect of regulating qi and broadening the middle, stagnation and elimination of flatulence. Clinically, it is used for the treatment of Qi stagnation, distension and pain in the chest and ribs, food accumulation, phlegm and drink, and prolapse of organs. It is contraindicated for use in pregnant women, and the adverse effects are not clear. Therefore, the two drugs, Houpu and Citrus aurantium, are used together to dry dampness and eliminate phlegm, stagnation and flatulence. If you need to use the drug, you need to be under the guidance of a physician.