Classification according to the collection method:

(l) The sawdust buck begins to grow velvet in the second year after birth, and it begins to sever in the third year after birth. Mostly cylindrical branches, branches top obtuse, large and very long 14 to 30 cm, more with 1 to 3 lateral branches, bifurcation asked a gray black raised tendons, lateral branches 9-18 cm, diameter than the main branch Slightly fine, scaly, white, old, peripheral, often ossification, dense, cellular pores (sub-eye), velvety brown to gray-brown, cloth fine hair, densely dense, soft and smooth; . Older saw-swept hairs are sparsely rough, with vertical ribs on the lower surface and light body. The two sticks of antler can be harvested twice a year, so there is also a saying that there are two heads and two oysters. It can be harvested 1-2 times a year. Two times a year, for the first time in the Ching Ming. Harvested 45 to 60 days after the festival, used to be called "head velvet"; about the second time before and after the beginning of autumn, the antler harvested was called "two oysters." Head swiftness and swiftness: The swift and velvety horns (Gong Ting and Menzhuang (lateral branches 1 cm away from the kerf)) are suitable for proportionality. They are round and well-shaped, beautiful in shape, thick in velvet, brownish or brown-yellow, fine and soft in hair, and well-arranged. , Saw more than 95% oval, can not see the ossification of the ring, the texture of the velvet soft and very light. Dioscorea velutipes: also known as rejuvenation. The quality of the recycled velvet is poor, easy to identify, and rarely seen in flower buds. It is generally spent on two bars. The regenerated flowers are quite large and the gates are not commensurate. They are long and not round or thick and thin, and they are mostly flat. They have irregularly formed prisms, and the surface is convex and concave, and the gate is short. Thin and thin, mostly grayish-brown, rarely dark brown, rough and hard hair, some rough hair and black, body-specific, fluffy, a bunch of irregularly arranged on the vertical. Saw mouth is not round, approximately square, can see the ossification of the ring, ossification of the outer ring ossification, heavier antler, no hernia. Before sawing velvet,: Give rich feed and isolate it from the female deer, so that you can get heavy, large, high quality antler.

(2) The cutting of velvet is now rarely used because it damages the deer. Chives are suitable for old deer or sick deer that grow for 6-10 years. The method is to cut the deer head and saw the antler together with the skull. Cut velvet refers to the velvet attached to the skull. The appearance is the same as that of sawdust. However, the antler horn is connected to the brain bone to form a ring-like inflated surface, with a rough surface or a small raised ridge (nail). The front of the cranial bone is flush and flat. There are a pair of arc-shaped bones on both sides of the line, commonly known as "tiger tooth", leaving the surface of the brain bone with fur. Above pilose antler are thick and full, tender oil is better. Whether it is saw-stem or velvet, the resulting antler must undergo extremely complex processing to be used as a medicinal material in clinical practice.