Zhongman is the distension of the abdomen caused by stagnation of food. "Lei Zheng Zhi Cai·Zhongzhang" says: "For those with stagnation of food, Zhongman is specially digested and promoted, and Hezhong Wan is used. People often eat too much fat, sweet and greasy meat, and "food stagnation" is a common thing. Experts remind that during the festival, we should avoid eating too much fish and meat. If there is food stagnation and poor appetite, "Jiao Sanxian" can be used to strengthen the spleen and appetite, and digest food and eliminate stagnation. "Jiao Sanxian" refers to scorched malt, scorched Shenqu, and scorched hawthorn. These three medicines all have the function of digesting food and eliminating stagnation, and they are often used in combination, so they are called "Jiao Sanxian". Hawthorn can strengthen the spleen and appetite, digest food and eliminate stagnation, especially for food stagnation caused by eating too much meat and greasy food. Shenqu can strengthen the spleen and digest food, relieve the exterior and eliminate dampness, mainly for eating too much rice and noodles, and can eliminate stagnation of grain food. Malt can promote qi and digestion, strengthen the spleen and appetite, and is often used to treat indigestion, spleen deficiency and less food.