Which five crops are the five grains?

Rice, millet, sorghum, wheat, corn

"Grain" is the simplified form of "cereal", which originally referred to grain with a shell; like rice, jíji (jì计, i.e., grains), millet (also known as yellow rice) and so on, there is a layer of shell, so it is called "谷". The word "grain" was originally used to refer to grain with a shell. The sound of the word "grain" comes from the sound of the shell.

The earliest record of the term "grains" is found in the Analects. According to the Analects of Confucius, more than 2,400 years ago, when Confucius was traveling with his students, Zi Lu, who was lagging behind, met an old farmer carrying a bamboo basket with a staff and asked him, "Have you seen Fu Zi?" The old farmer said, "If you don't work on your limbs and can't tell the grains apart, who is Fu Zi?" ?