It is normal for Russian elm to have sour taste. According to the inquiry data, it is normal for Russian elm to have sour taste, and it is also normal for elm itself to have sour taste, especially in wet season, because elm will return the smell to the wood after absorbing water and slowly volatilize. In a dry and ventilated environment, the smell will evaporate quickly. Ulmus pumila, Ulmus pumila and Ulmus pumila are mainly produced in temperate zones, deciduous trees and tall trees, which are distributed all over the north, especially in the Yellow River basin. Elm wood is tough, clear in texture, moderate in hardness and strength, suitable for general relief carvings, smooth in plane, beautiful in chord patterns, and "chicken-winged wood" patterns, which can be used for furniture and decoration. After drying, modeling, carving, polishing and painting, elm can be made into exquisite carved lacquer crafts.