In modern common Chinese, commonly used grains refer to: rice, wheat, soybeans, corn and potatoes. At the same time, grains other than rice and flour are customarily called miscellaneous grains, and miscellaneous grains also refer to food crops, so grains are also a general term for food crops.
The word "five grains" in ancient times generally refers to: millet, beans, hemp, wheat and rice; At the same time, grain can also be a common word, referring to crops or agricultural products. Can be extended to foods and beverages containing cereals or native crops as raw materials.