Millet, also known as millet, is called millet in the north, millet milled into millet, its grain is small, about 1 mm in diameter. Xiaomi is one of the oldest cultivated crops in the world. It originated in the Yellow River Basin of China and was the main food crop in ancient China. Millet grows drought-tolerant and has many varieties, commonly known as "millet has multicolored", there are millet of various colors such as white, red, yellow, black, orange, purple, and sticky millet. The earliest wine in China was also brewed with millet.