The theory of peach wood to ward off evil spirits has a long history. Why can mahogany ward off evil spirits? First, it originated from the characteristic culture of the Chinese nation. "Without peach", China people have believed that peach wood can ward off evil spirits for generations. Etymology: "In ancient times, Taomu people stood at the portal to ward off evil spirits". There is a cloud in the Book of Arts in the Western Han Dynasty: "The peach maker is the essence of five trees, which inhibits evil spirits, and this immortal is also wood." There is a saying in the Chronicle of Jingchu in the Southern Dynasties: "Taoist priests suck the five elements to suppress evil spirits and control hundreds of ghosts." In the Han Dynasty, peach seals were carved and hung on the portal to suppress evil spirits. In the Song Dynasty, carving a peach symbol-carving the appearance or name of two immortals and hanging them on both sides of the door to ward off evil spirits-was also the legendary gatekeeper in China. Second, it is derived from medicinal value. Compared with other fruits, flying peach has higher medicinal value. Fat peaches are dense, sweet and juicy, and rich in vitamins. It has a good moisturizing effect for people with insufficient stomach yin, dry mouth and thirst, or insufficient body yin. Peach contains more potassium and less sodium, which can be used as an auxiliary fruit for patients with edema. Peaches also have a good auxiliary effect on senile prostatic hyperplasia and constipation. "Compendium of Materia Medica" says: "Peach tastes pungent and evil, but it can be disgusting." It is also recorded that peach leaves, peach skin, peach gum and peach hair can be used as medicine to treat various diseases in gynecology and pediatrics. The third is the health care function of peach charcoal. Peach charcoal is made of peach wood, which keeps the original structure of peach wood. It has a new function-health care for human body, especially for wind, cold, heat, dampness, dryness and fire, and has the value of exorcism and medicine.