Experts say that rhinoceroses existed in China before the Warring States Period (403-222 B.C.), which explains why the Shan-hai ching, or Classic of the Mountains and Seas, from the later Han dynasty (206 B.C.- 219 A.D.) mentions medicine made from their horns.
根據動物專家考據，我國在戰國時代之前，還有犀牛存在，因此漢代「山海經」書中，就有中藥犀角的記載。