In the ancient literature and bronze inscriptions, the matrix (y) is the most important wine in the ancient world. It is popular in business and western zhou. Many of the objects found in koshi were excavated from the mound or excavated in the state of wu. In the western zhou dynasty bronze girder, the cross section of this instrument is elliptical, with a cover, and a vertical skirt with a straight skirt. The cover is straight, and the cover is a small bird, with a flat girder and a bull's head on both ends. The neck and top cover are decorated with small circles of parallel fine lines, and the circle foot is decorated with oblique triangular moire pattern.