Five grains refer to wheat, corn, rice, soybean and potato, but at the same time, they are also used to call grains other than rice and flour as miscellaneous grains, and they are also generally referred to as grain crops, so they are also the general name of grain crops.
It has a very long history to say that five grains and miscellaneous grains. Chinese people have followed the grain based diet for thousands of years. As early as 2000, it was mentioned in the book Huangdi Neijing. It is generally believed that wheat and rice are fine grains, and miscellaneous grains refer to other grains besides them. The miscellaneous grains we are talking about now include a variety of grains and beans, such as corn, millet, barley, black beans, broad beans, green beans, peas, sweet potatoes, etc.
