Osmanthus fragrans is an evergreen shrub of Oleaceae Native to the eastern Himalayas in southwest China, but also distributed in Indian, Nepalese and Cambodian. It likes warmth, strong resistance, high temperature resistance and cold resistance. The height of the tree is 3-5m, the bark is grayish brown, the branchlets are yellowish brown, the leaves are leathery, elliptic, oblong or elliptic-lanceolate, the base gradually narrows into a wedge shape or a wide wedge shape, the cymes are clustered in leaf axils, and the bracts are broadly ovate.