What do you mean by grain separation?

They are as follows:

Cereals: rice, millet, millet, wheat and beans.

Five tones: Gong, Shang, Jiao, Zheng and Yu.

Five kinds of grains are commonly known as "grains". There are many sayings about "five grains" in ancient times, and there are two main ones: one refers to rice, millet, millet, wheat and glutinous rice; The other refers to hemp, millet, millet, wheat and glutinous rice.

Five-tone scale, the ancient melody of Han nationality. That is, according to the order of five degrees, from palace yin to lingering sound, the order is: palace-up-angle-positive-jade; If arranged in pitch order, it is: 1 2 3 5 6 Gong Shang Jiao Qian (zhǐ) feather. "Harmony, division, b, tardiness and fairness" were used in the Tang Dynasty.

The Origin and Evolution of "Five Grains"

Grains were called grains in ancient times, and the word "grains" first appeared in The Analects of Confucius. China's famous ancient book Huangdi Neijing said: "Grains are nourishment". There is a saying among the people that the grain is abundant. In ancient times, there were five kinds of grains, namely rice (paddy), wheat (wheat), glutinous rice (beans), millet (yellow rice) and millet (millet is millet).

Later, during the Wanli period of the Ming Dynasty, corn and sweet potato were introduced into China from South America and Nanyang respectively. "Grains" refer to puffer fish, wheat, corn, soybeans and millet.

Now we often say that cereals usually include rice, wheat, soybeans, corn and potatoes. Traditionally, grains other than rice and flour are called miscellaneous grains. Staple food and miscellaneous grains are collectively referred to as grain. Coarse cereals such as peanuts and sesame seeds that can be used to extract oil are called oil seeds.