Wuyuan jelly is a Han nationality speciality in Shanxi Wuyuan. In the summer, jelly is one of the foods that ordinary people like to eat, and Shanxi Wuyuan people love to eat jelly, regardless of spring, summer, autumn and winter. On the streets, there are dozens of cool powder stalls all year round. Wuyuan jelly powder is made from potato starch. It is added with a proper amount of alum, stirred into a paste, cooked on the fire, and poured out on the cold, so it is also known as whitefly.