Artemisia argyi with stalk cylindrical shape, yellow-green or brown-yellow surface, with longitudinal ridges, slightly hard and easy to break, with pith in the middle of the section; leaf curled and fragile, intact three-pinned deep-splitting, small lobes The rectangle is round or long oval, and the two sides are short-haired. Because of its fragrant and special, the medicinal value is extremely high. It is used to treat summer heat, yin deficiency and fever, night heat and cold, bone steaming heat, malaria, cold and heat, damp heat. Huang Wei, Zhuo Shi effective.