Acorus calamus, whose leaves are shaped like swords, not only have the functions of killing insects and sterilizing, but also remind the ancients of the purpose of hanging it in front of the door to ward off evil spirits and avoid harm. More exquisitely, Acorus calamus will be directly cut into the shape of a sword.
Extended data
Pay attention to hanging wormwood and calamus before the Dragon Boat Festival;
1, calamus is inserted or hung on the door during Dragon Boat Festival.
Acorus calamus (common construction), banyan trees and Acorus calamus are usually tied into a bundle with red paper and then inserted or hung on the door. Because Acorus calamus is the first of the five auspicious symbols in the sky, it symbolizes the ominous sword, because the season and shape of growth are regarded as the gods who feel all kinds of yin, and the leaves are sword-shaped, so it can avoid evil when inserted at the door.
2. During the Dragon Boat Festival, Acorus calamus and Folium Artemisiae Argyi are tied up with red lines and inserted on the lintel.
Acorus calamus and Artemisia argyi are easy to survive. In a village in Longbo Town, Shuangpai County, many families scatter a handful of seeds in front of their houses and collect them during the Dragon Boat Festival. They tied Acorus calamus and Folium Artemisiae Argyi together with red cloth strips or red lines, and inserted them on the lintel, which can drive away pests such as mosquitoes.