Five kinds of grains commonly known as "five grains". There are many different opinions about "five grains" in ancient times, and the most important ones are two: one refers to rice, millet, millet, wheat and glutinous rice; The other refers to hemp, millet, millet, wheat and glutinous rice. The difference between the two is that the former has rice without hemp, while the latter has hemp without rice. The ancient economic and cultural center was in the Yellow River valley, and the main producing area of rice was in the south, while the cultivation of rice in the north was limited, so there was no rice in the "five grains" at first.
Grain culture plays an important role and can be described as the origin of human civilization. According to authoritative data, human beings have observed traces of sorghum on stone tools hundreds of thousands of years ago, indicating that grains have bred human beings for more than 100 thousand years. It is a feat in human history that human beings cultivate wild weeds into coarse grains, which gave birth to human civilization. At the same time, tell the world that human beings have an indissoluble bond with grains. Grain painting is the highest artistic embodiment and artistic portrayal of grain culture.