Jin Sinan is a precious wood unique to China. Representative species nanmu (scientific name: Phoebe? Zhennan? S. Lee): Formerly known as "Zhennan". Big tree, more than 30 meters high, with straight trunk. Branchlets are usually thin, angular or nearly cylindrical, and are grayish yellow or grayish brown villous or pubescent. Jin Sinan is the general name of Phoebe bournei (including Phoebe bournei, Phoebe bournei, Phoebe bournei and Phoebe bournei). ) has golden silk and satin luster in some materials. Jin Sinan in a broad sense refers to Phoebe bournei, also known as Jin Sinan.

Elm (scientific name: Elm? L.): Also known as spring elm and white elm. , known as "elm", is a deciduous tree of Ulmaceae. The bark of young trees is smooth, grayish brown or light gray, and the bark of big trees is dark gray, irregularly deep and longitudinally cracked and rough; Branchlets glabrous or hairy, without swollen cork layer and raised cork wings; Winter buds are nearly spherical or ovoid. Leaves are oval, oval, etc. The leaves are smooth and hairless, the back of the leaves is pubescent when they are young, then they become hairless or some veins have tufted hairs, and the petiole surface is pubescent. The leaves of flowers bloom first and cluster in the axils of branches. Samara sparsely obovate, rounded.