Deer antlers, the young unossified and velvet antlers of the stag of the sika deer or the horse deer, are valuable Chinese medicinal herbs. Antlers are just the horns on the head of the male deer, including the antlers and the adult hard horns. Sika deer a medium-sized deer, body length 140-170 cm, shoulder height 85-100 cm, adult weight 100-150 kg, females are smaller, stags have horns, generally four-forked. There is a dark brown dorsal line in the center of the back.

The tail is short, black on the back and white on the belly. Summer hair brownish-yellow, all over the distinctive white plum blossom spots, rump spot white, so called "plum deer".

The sika deer lives at the edge of forests or in mountainous grassland areas. Seasons are different, the habitat also changed. The stag usually lives alone, and returns to the group during the rut and mating. Morning and evening activities, to grass and leaves for food, good licking salt and alkali. One fawn per litter, with white spots on the young. It is mainly found in China, Japan and Russia.

The horse deer is second only to the moose in the large deer, *** there are 10 subspecies, because the body shape like a horse and so named, the body is dark brown, back and sides have some white spots. Males have horns, generally divided into six forks, up to eight forks, antler horn of the second fork immediately after the brow fork. Summer hair is shorter, no velvet, generally russet, darker on the back, lighter on the belly, so there is a "red deer".