"Rice, millet, millet, wheat and glutinous rice" were commonly known as grains in ancient times, and barley, wheat, rice, adzuki beans and flax were also called grains in Buddhist sacrifices. Subsequently, the Compendium of Materia Medica written by Li Shizhen recorded 47 species, including 33 species of cereals and 4 species of beans/kloc-0. In modern life, according to the classification basis of category and taste, the categories of whole grains are different.