From thousands to tens of thousands, it depends on what kind of people you meet. In fact, the production of cold rice noodles is very simple. Most importantly, people don't know the correct method of making cold rice noodles, or even what they are made of. Therefore, you must know the basic common sense when learning the cold noodle technology. Bean jelly is a kind of pure starch food, which is made of starch in wheat flour. If you look at flour from the perspective of bean jelly, flour is composed of gluten and starch. Therefore, to make bean jelly, we must first separate gluten from starch, and the way to separate gluten from starch is to wash your face, which is why you must wash your face when making bean jelly. Although cold noodle is a kind of pure starch food, not all starch can be used to make cold noodle. For example, pea starch is most suitable for making cold noodles, and sweet potato starch is most suitable for making vermicelli. Similarly, wheat starch is most suitable for cold rice noodles, and no other starch can make the unique soft, translucent and smooth quality of cold rice noodles.