Attachment: the complete angle is long and conical, slightly arched, 25 ~ 40 cm long, about 3 cm in diameter at the base, white or yellow-white. Except the tip part, there are 10 ~ 20 raised ridges with few young branches. The tip is smooth and round, curved in a conical shape, smooth as jade, the branchlets are bloodshot or perspective purple-black, without cracks, and the old ones have longitudinal cracks without black tips. The base of the horn is round, with bone plugs and antelope plugs, accounting for about half or one-third of the total length. The bone plug is round, hard and heavy. The surface of the bone plug protrudes along the grain and meets the groove on the inner surface of the corner. It's strong. Seen from the cross section, the joints are irregular and serrated. After removing the bone plug, the lower part of the horn is simple and hollow, and there are fine holes leading to the tip, commonly known as the eye of the sky, which is visible in the near light, which is the main distinguishing feature of antelope horn. It's hard. Odorless and tasteless. Tender, white, smooth, bloodshot and crack-free are preferred. Those old, yellow, white and cracked are inferior products.