Long Xianxiang is the saliva of the dragon, which has been circulated for a long time. However, it was fishermen from Karath Island who first discovered Long Xianxiang. Fishermen on this island mainly make a living by catching sperm whales. Once, an old fisherman found a piece of Long Xianxiang while cutting the intestines of a sperm whale. At that time, fishermen thought it was swallowed from the sea, not in front of it. But the news spread like wildfire, which attracted the attention of marine biologists. They immediately conducted in-depth research and finally solved the mystery of Long Xianxiang. It turns out that both squid and octopus have tough horny jaws and tongue teeth in their mouths, which are not easy to digest. When a sperm whale swallows a large mollusk, its jaws and tongue teeth accumulate in the gastrointestinal tract, which stimulates the intestine, secretes a special wax, wraps the food residue and slowly forms a Long Xianxiang. Long Xianxiang has been used as a high-grade perfume since ancient times. Long Xianxiang purchased by perfume company is graded, ground into very fine powder, dissolved in alcohol, and then made into 5% Long Xianxiang solution, which is used to prepare perfume or as fixative. Therefore, Long Xianxiang is very expensive, almost equivalent to gold. In the latest market quotation, Long Xianxiang's price per pound reached 635,000 yuan, and the market has a price but no market. In TCM, Long Xianxiang recorded in Compendium of Materia Medica as "promoting blood circulation, benefiting essence, helping Yang Dao and promoting blood circulation". It is a valuable Chinese medicine for treating diseases and strengthening the body.