There are six kinds of rice, namely rice, black rice, glutinous rice, brown rice, millet and coix seed.

2. Taking rice as an example, rice is mainly a finished product made through a series of processes such as washing, hulling, rice milling and finishing. Rice embryos and aleurone layer contain nearly 64% of rice nutrition and more than 90% of the nutrients needed by human body. Rice is the main food of southerners.