Millet originated from the Yellow River valley in northern China, and was the main food crop in ancient China, so Xia and Shang Dynasties belonged to "millet culture". Millet is drought-tolerant, with many varieties, commonly known as "colorful millet", including white, red, yellow, black, orange, purple millet and sticky millet. The earliest wine in China was also made from millet. Millet is suitable for growing in arid areas without irrigation. Its stems and leaves are hard and can be used as feed. Generally, only large livestock such as cattle, horses and sheep can digest it.
Rice is the finished product of rice after washing, hulling, milling and finishing. The cleaning process is to remove all kinds of impurities mixed into rice by using appropriate equipment, appropriate technological process and appropriate operation methods, so as to improve the quality of finished rice, and at the same time, remove nails and iron filings from rice by using magnets to ensure production safety. The husking process is to remove the glume of rice with rubber roller husker or emery husker, and separate the glume from brown rice. In the process of rice milling, brown rice is milled and kneaded by a rice mill to separate the cortex from the endosperm, and then milled, shelled, broken and dried to obtain the rice with the required grade.
Wheat is a general term of Triticum, a gramineous plant, which is widely planted all over the world and originated in the Middle East. Wheat is the second largest food crop in the world, second only to corn, and rice ranks third. Wheat caryopsis is one of the staple foods of human beings. After grinding into flour, it can be made into bread, steamed bread, biscuits, cakes, noodles, fried dough sticks, fried cakes, scones, pancakes, jiaozi, fried dumplings, steamed buns, wonton, egg rolls, instant noodles, naan cakes, pasta, Gusmi and other foods. After fermentation, it can be made into beer, alcohol, vodka, or biomass fuel. Wheat is rich in starch, protein, fat, minerals, calcium, iron, thiamine, riboflavin, nicotinic acid and vitamin A, etc. Due to different varieties and environmental conditions, the nutritional components are quite different.
Rice is a favorite staple food in China, South Korea and Southeast Asia. It is steamed or stewed with rice and appropriate amount of water.