What little knowledge do you need to know about "Mangzhong"?

Hanging wormwood and planting awns coincides with the Dragon Boat Festival (the fifth day of the fifth lunar month), and every household hangs calamus on the lintel to ward off evil spirits and drive away poison. Therefore, May was also called "general month" in ancient times. Because the weather is getting hotter and hotter, mosquitoes breed, bacteria, fungi and other organisms are easy to reproduce, so May is also called "the month of all poisons". In addition, clothes, wood, rattan products are also easy to be damp and moldy. Legend has it that wormwood is a fairy's sword. In ancient times, the fairy learned that the water monster wanted to use some flooded places as her own territory and sympathized with the people, so she cut wormwood and calamus as swords to fight against the water monster. After several days and nights of war, the immortal finally won!