Nutritional rice flour refers to strip and filamentary rice products made from rice by soaking, cooking, layering and other processes, rather than powdered materials made from rice by grinding. The texture of rice flour is flexible and elastic, and it does not paste soup when cooked, and it is not easy to break when fried. They are cooked or fried with various dishes or soups, which are smooth and delicious, and are deeply loved by consumers (especially those in the south). There are many kinds of rice noodles, which can be divided into row rice noodles, cube rice noodles, corrugated rice noodles, silver rice noodles, wet rice noodles and dry rice noodles.