The dosage of the original formula is 120g of Atractylodes macrocephala, 90g of Atractylodes macrocephala, 60g of Pericarpium Citri Reticulatae, 30g of Glycyrrhiza Uralensis, the above medicines are in bulk, each time to take 6g, when used clinically as a traditional Chinese medicine soup, it can be followed by the above medicines, the specific dosage should not be constrained. Ping Stomach San is from “Brief Jizhong Fang”, which has the effect of drying dampness and transporting the spleen, moving qi and stomach (regulating the stomach and internal organs by promoting the operation of qi), and can be used to treat dampness stagnation in the spleen and stomach syndrome, which can be seen in the distension of stomach and epigastric area, tasteless food, nausea and vomiting, heavy limbs, belching and acid swallowing (swallowing acid from the stomach that goes up to the oropharynx), and lethargy, such as sleepiness. However, it should not be used by people with deficiency of yin and stagnant qi, or weak spleen and stomach. Flat stomach powder needs to be used under the guidance of a professional Chinese medicine practitioner to identify the evidence, do not use it blindly.