A custom of Suzhou Dragon Boat Festival

The fifth day of the fifth lunar month, that is, the Dragon Boat Festival, is around mango in the twenty-four solar terms. After the awning, the monsoon rain belt in southeastern South China is stable, which is the most rainy season in a year. The middle and lower reaches of the Yangtze River have entered the rainy season one after another, with more rainy days, more rainfall, less sunshine and sometimes lower temperatures. This climate is suitable for the growth of various insects and microorganisms. Wormwood is a commonly used incense plant, and its volatile substances can repel mosquitoes, which evolved from hanging wormwood at the door.