Folium Artemisiae Argyi on May Day is used to prevent diseases and detoxify. May is recognized as an evil month in folk letters, also known as "poisonous month". From a scientific point of view, it means that the temperature rises rapidly at this time, the weather is hot, pathogenic microorganisms multiply in large numbers, and viruses breed, which makes people extremely uncomfortable.

In order to cope with the evil month and spend the summer safely, people choose to eat some foods with high nutritional value during the Dragon Boat Festival, and collect some herbs to hang, wear or take to prevent diseases.

Other customs of May Festival.

Every family will eat zongzi on Dragon Boat Festival in May, and the most traditional one is red bean glutinous rice zongzi. Red beans not only contain a variety of nutrients, but also have the effects of diuresis, blood discharge, detumescence and detoxification. It is a rare product for clearing away damp and heat in summer.

In ancient times, on the Dragon Boat Festival, every household hung mugwort leaves and calamus collected from the fields on their doorways. Some people bathed mugwort leaves, calamus and garlic in boiling water, sprayed them in front of the house or soaked them in medicinal liquor. In some places, people also like to grind Artemisia argyi and Acorus calamus into powder, wrap them in cloth and make sachets (also known as sachets and sachets) as decorations to prevent insects and bacteria from invading with their fragrance. ?

Refer to the above? People's Network-Dragon Boat Festival: What is the scientific basis for inserting wormwood or calamus?