By observing antelope horn. Male horn, short and small, long 15 ~ 20cm. The base of the horn is very close, only 1 ~ 2 cm away. After the frontal bone grows, it inclines backward and upward, and the corner tip bends slightly backward and downward. The corners are sharp and smooth, and the rest have more than 10 transverse edges. The number of transverse edges is related to age. There are shallow and thin longitudinal grooves between the transverse ribs, but the transverse ribs are not split. But the female's horns are long and straight, black and shiny, with a spacing of 20-30 cm.