Niuhuang is a stone in bovine bile. "Yellow" originally refers to its color, and later gradually evolved into a synonym for stone. Talking about Animals says: "There is yellow in the intestines of cattle." "Compendium of Materia Medica" said: "The yellow of cattle is also the disease of cattle. ..... between the heart and the liver and gallbladder, it condenses into yellow. " Niuhuang has the functions of clearing away heart fire, resolving phlegm, inducing resuscitation, cooling liver, calming wind and detoxifying; Can be used for fever, coma, apoplexy, phlegm, convulsion, carbuncle and furuncle. In China idioms, "Niuhuang Goubao" is a derogatory term, but in traditional Chinese medicine, they have been regarded as precious medicinal materials since ancient times. According to the Notes on Materia Medica in the Northern and Southern Dynasties, bezoar is "one son, three cents, and the good one is worth five or six thousand to ten thousand." Therefore, Niuhuang, Malikebao and Goubao are called "ugly treasures" (ugliness is the year of the ox) to show their value. A dog's treasure is a stone taken from a dog's stomach. Most of them are spherical, with a grayish white or grayish black surface and a slight luster. Its most significant function is to reduce adverse reactions, relieve depression and detoxify, and it has special effects on hiccups and nausea. People usually call burping, bloating and not thinking about diet "dog disease".