Ambergris, also known as gray amber in the West, is a solid waxy flammable substance with a gray or black appearance that is produced in the digestive system of sperm whales. Ambergris has a unique sweet earthy aroma (similar to the smell of isopropyl alcohol) and was historically used primarily as a fixative for perfumes. With the development of science and technology, most of its ingredients can be replaced by chemical compounds. In addition, ambergris is also a precious Chinese medicinal material