Why do you put lime in the corner during Dragon Boat Festival?

No matter how different people’s interpretations of May as an evil month are, it is a common practice across the country to regard May as an evil month and perform customary activities on the Dragon Boat Festival to ward off evil spirits and exorcise poisons. In Zhejiang, people often spread lime between walls and spray realgar wine to prevent insects from lurking. In the minds of ancient people, May, when the Dragon Boat Festival is held, was mostly regarded as the "evil month", while the Dragon Boat Festival was regarded as the "five poisonous days". Regarding why the Dragon Boat Festival is a five-poison day, the "Fengtian Tongzhi" in the 23rd year of the Republic of China contains the following explanation in the "Gaiping County Chronicle": "The fifth month of Gaiping belongs to Wu, the fifth day is the Dragon Boat Festival, and the two Wu days belong to the sign of strong fire. If it is too prosperous, it is poisonous..." People in Xinmin, Liaoning believe that this day is the lower realm of the plague god.

Some people say that on this day, snakes, centipedes, scorpions, geckos, toads and other five poisons will come out to harm people.

Some scholars believe: "'May 5th' is the so-called 'Dragon Boat Festival'. It is at the transition moment of late spring and early summer, when it is still cold and warm, insects are scurrying, and diseases are prevalent. There may be Certain plagues and disasters occur in certain areas and tribes during the Dragon Boat Festival, and tragic and frightening memories, legends, and superstitions create and expand into an ever-increasing range of taboos, traditions, and customs."