There is a difference in medicinal parts, flavor and attributes, efficacy, main treatment and contraindications between Houpu and Hovenia. Hedera japonica is the dried bark, root bark and branch bark of Hedera japonica or Hedera japonica concave leaf of Magnoliaceae. It is bitter and pungent in flavor, warm in nature, and belongs to the spleen, stomach, lung and large intestine meridians. It has the efficacy of drying dampness, eliminating phlegm, and lowering qi to remove fullness (allowing qi to flow downward to alleviate the discomfort of distension and fullness). Hau Pu is used for dampness stagnation, vomiting and diarrhea, food stagnation (accumulation of food in the stomach due to indigestion), gas stagnation, abdominal distension and constipation, and phlegm (a pathological product of impaired metabolism of water and fluid), wheezing and coughing, etc. The adverse effects of this product are unclear. The adverse effects of this product is not clear, because it is easy to consume gas and injure fluid, so be careful with those who have gas deficiency and fluid deficiency. Citrus aurantium is the young fruit of the rutaceae plant lime and its cultivated varieties or sweet orange. It is pungent, bitter, sour, slightly cold in nature, and belongs to the spleen and stomach meridians. It has the efficacy of breaking down qi and eliminating stagnation, resolving phlegm and dispersing lumps, and is used in treating stagnation of internal stagnation, lumps (stomach distension and discomfort) and distension, diarrhea and dysentery, impassability of stools, phlegm and qi obstruction, thoracic paralysis (stuffy pain in the chest), knotting of the chest, and prolapsing of the viscera. The adverse effects of this product are not clear, pregnant women and people with weak spleen and stomach should be cautious. If there is a need for medication, it is recommended that it be used under the guidance of a professional physician, and not blindly self-medication.