2. Rice (dào), namely rice; Millet (sh incarnation) refers to a kind of millet, called millet in ancient times, which can make wine and cakes. Millet (Ji), the length of grain, also known as sorghum; Wheat (mài) is an annual or biennial herb, which is used for milling, sugar making or wine making. Shū, a general term for beans and beans.
3. Grains culture plays an important role, which can be described as the origin of human civilization. Authoritative data show that humans observed traces of sorghum on stone tools hundreds of thousands of years ago, indicating that five kinds of grains have been pregnant with humans for more than 100 thousand years.