1. To prevent plague, Chinese herbal medicines can be made from local materials. Pharmacological research of modern medicine shows that Folium Artemisiae Argyi is a broad-spectrum antibacterial and antiviral drug, which can inhibit and kill a variety of viruses and bacteria and has a certain preventive and therapeutic effect on respiratory diseases.

2. wormwood has a close relationship with people's life in China. Every Dragon Boat Festival, people always put wormwood at home to ward off evil spirits. The withered plants are soaked in water for disinfection and itching relief. Mothers often bathe or fumigate with wormwood water.

3. According to the traditional theory of medicinal properties, Folium Artemisiae Argyi has the functions of qi and blood, expelling cold and removing dampness, warming menstruation, stopping bleeding and preventing miscarriage. Modern experimental studies have proved that Artemisia argyi leaves have antibacterial and antiviral effects; Antiasthmatic, antitussive and expectorant effects.

Extended data:

Every Dragon Boat Festival, according to folk tradition, mugwort leaves are hung in front of every household. According to the older generation, this is to "ward off evil spirits", but more importantly, to drive away mosquitoes, flies, insects and ants and purify the air. Therefore, the Dragon Boat Festival has always been called "Health Festival".

With the improvement of people's living standards, the custom of hanging wormwood has not changed. Most wormwood is planted at home or picked from the wild. People usually plant some wormwood in front of and behind their houses or in a small corner of private plots.

The Dragon Boat Festival on the fifth day of May is one of the four traditional festivals in China. Every household regards hanging wormwood and calamus as an important activity.

References:

Baidu encyclopedia-wormwood