The "five" in the grain is an imaginary number, not just the grain. Among them are rice, millet, millet, wheat and glutinous rice. There are six kinds of crops, among which soybean is the best. Zizania latifolia is the general term for beans.

Rice and wheat are still the main foods in China. In China, rice (rice) cultivation originated in the Shennong era in southern China about 4,700 years ago. The cultivation of wheat (barley and wheat) was introduced into North China in the late prehistoric period or before Pan Geng moved to Yin.