Rice flour is made of rice through soaking, cooking and other processes. Rice noodles, also called rice noodles, are very smooth and chewy and can be cooked directly. There is a great difference in diet between the south and the north of China. In the north, wheat is the main food, steamed bread, noodles and other delicacies are made of flour ground from wheat, while in the south, rice is the main food. Besides being steamed directly into rice, rice can also be made into rice flour, which tastes like noodles.

High-quality rice is washed, soaked in water, and then ground into rice slurry by machine after the texture is soft. After cooking, the rice paste can form sticky rice paste, and then it can be made into vermicelli with different thickness by physical technology. There are many kinds of vermicelli, and the common ones are row rice noodles, cube rice noodles, corrugated rice noodles, silver rice noodles, wet rice noodles and dry rice noodles.