Dragon Boat Festival is a multi-ethnic "health festival" for all people to prevent diseases, avoid epidemics and drive away drugs, and pray for health and longevity. There is an aromatic substance in wormwood, which can promote blood circulation and dredge collaterals. As early as Huatuo Bian Que's time, the ancient method of fumigation and detoxification with wormwood was adopted. Many people order medical moxa sticks every day in summer, or smoke houses with moxa sticks to repel mosquitoes. Because moxa smoke can inhibit a variety of pathogenic bacteria, fungi and viruses that cause different infectious and epidemic diseases.
There is a saying among the people: wormwood can cure all diseases and invite blessings. Hanging on the door can get rid of all kinds of poisons and make people healthy. Therefore, the ancients said that "Ai" can "ward off evil spirits". So far, there is a saying that "the family has Ai for three years, and the doctor doesn't have to come." On the Dragon Boat Festival, people sweep the courtyard, hang branches of Artemisia argyi, sprinkle realgar wine, stir up turbidity, remove rot, sterilize and prevent diseases.