The vermicelli should be made of sweet potato powder as the main material, and cassava starch can be used for ignition, so the way to distinguish it is to burn it. If the vermicelli burns in the fire and emits yellow flames, it will prove that it is genuine. If it only melts without burning or crackles with a dark blue flame when it melts, it is counterfeiting or counterfeiting. There will definitely be noodle soup in the real vermicelli, and the real vermicelli is irregular. If the vermicelli you buy is neat and there is no noodle soup, then I need to be careful. Smell it with your nose immediately, then soak the vermicelli in hot water for a while before smelling it;

Put the soaked vermicelli in your mouth and chew it carefully to taste its taste. The smell and taste of excellent vermicelli are normal, without any odor. The weak vermicelli is bland or slightly smelly. Fake vermicelli is peculiar smell, strange taste, astringent taste and other external tastes, and the taste is gravel soil. Looking at the color of the vermicelli, generally speaking, the pure sweet potato vermicelli should be translucent and turquoise or slightly yellow, while the vermicelli with Ming Gong looks yellow, especially under natural light, and the vermicelli with Ming Gong should be bright.

The other thing is to see if there is dough soup in the vermicelli. Pure sweet potato vermicelli is difficult to be mixed with water, so there will be some small pimples in the vermicelli more or less. If there are other cassava starch or edible gelatin, the vermicelli looks very balanced in size and has no small pimples at all. In fact, pure sweet potato vermicelli, in fact, her arrogance is not much, how to gently fold it with your hand, relatively speaking, you can fold it, and there are relatively no traces of bending.

If it is mixed with fake sweet potato vermicelli, when you fold it by hand, its tenacity will be particularly strong, and it will be very easy to die, and it will not be easily broken. Because pectin is mixed in it, its tenacity will be so great. Authentic vermicelli has no impurities, small black spots or small white spots, etc. If there is residue visible to the naked eye, it is vermicelli with poor quality; Authentic vermicelli is soft and strong in taste, but after stewing for more than half an hour, vermicelli will increase its water absorption and become paste soup, and vermicelli with edible gelatin will not be broken or chewed no matter how long it is cooked.