Specific meanings of rice, sorghum, hulled wheat and millet:
1. Rice is a straight cereal crop of Gramineae, and its main type is "rice" cultivated in soil (generally referred to as bare rice). Rice is an important grain widely planted in tropical Asia. South China is the main rice producing area, which is cultivated in all northern provinces.
2. Liang is a gramineous plant. Commonly known as millet, millet and millet, it is one of the main foods of people in northern China. Widely cultivated in temperate and tropical regions of Eurasia, the middle and upper reaches of the Yellow River in China are the main cultivation areas, and a small amount is also planted in other areas.
3. Phragmites australis, a generic term for beans.
4. Wheat, an annual or biennial herb, has many kinds, such as "wheat", "barley" and "oat", which usually refers to "wheat".
5. Xiaomi, also known as "millet" and "millet". In ancient times, the seed of millet was actually called millet, and it was called yellow rice after peeling, which was slightly larger than millet.
6. Millet, an ancient food crop, refers to millet or millet.