"Five Grains" is spoken in the Spring and Autumn Period and the Warring States Period. There are two main explanations of Han people and their descendants: one is rice, millet, millet, wheat and glutinous rice (that is, soybeans); Another way of saying it is marijuana, millet, millet, wheat and glutinous rice.

The difference between these two statements is that there is rice without hemp and there is hemp without rice. Although hemp seed is edible, it is mainly used for textile. Grain refers to grain, and the former statement does not include hemp in grain, which is more reasonable. On the other hand, the economic and cultural center at that time was in the north, rice was a southern crop, and cultivation in the north was limited, so there might be hemp in the grain without rice. The crops mentioned in Historical Records, a book written by a historian, are wheat, millet, millet, glutinous rice and hemp, which belong to the latter statement. Probably for these reasons, Han people and people after Han people have two different interpretations of grain. ?