Polygonatum odoratum, scientific name: Polygonatum odoratum (mill. Druce is a perennial herb of Liliaceae. Rhizomes are horizontal, the meat is yellow and white, and most fibrous roots are densely distributed. The leaves are green and the bottom is gray. Flowers axillary, usually 1 ~ 3 clusters. Originated in southwest China, but widely distributed in the wild. It is cold-resistant, shade-tolerant, and likes humid environment, and is suitable for growing in loose soil rich in humus. "Notes on Materia Medica" says that "the stem is hard, like a bamboo shaft, with knots." So it was named Yuzhu. The roots of plants can be used as medicine, and Chinese medicine is also called Polygonatum odoratum. Digging in autumn, washing, sun-drying until soft, repeatedly kneading, sun-drying, or steaming, kneading until translucent, sun-drying, and cutting into thick slices or slices for later use. Flavonoids extracted from Polygonatum odoratum combined with deoxynojirimycin extracted from mulberry leaves to form a new substance, which has the functions of lowering blood sugar, blood lipid and blood pressure.