In China's west coast of Leizhou Peninsula of the South China Sea and the west coast of Hainan Island, especially in coastal waters cities such as Danzhou, clinical high and Chengmai cities and counties, the growth of a kind known as the "rare gem" of a large pearl oyster –white lip shell.

White lip shell is a tropical and subtropical marine bivalve mollusks. It is the endemic shell of China's South Sea.Discount white lip shell is shaped like a plate. It is very big, generally 25 cm ~ 28 cm in length and 3 kg ~ 4 kg in weight.