Buckwheat head, also known as onion, is the underground bulb of perennial herbs in Liliaceae, with slender leaves, small purple flowers and edible tender leaves. Mature torreya grandis is big and full, white and glittering, spicy and tender, and contains many nutrients such as sugar, protein, calcium, phosphorus, iron, carotene and vitamin C. They are excellent cooking condiments and table accessories. DC dry head. It can strengthen stomach and eliminate phlegm, and treat chronic gastritis. According to "Classic", the head "cures golden sores and carbuncles, and wise men are not hungry and resist aging", "cures diarrhea due to shaoyin disease, pricks the chest to reduce qi, disperses blood and prevents miscarriage." It is rare in the world that something so delicious and can cure diseases.