Shanxi is the hometown of noodles. Datong Sliced ​​Noodles is a well-known traditional snack in Shanxi Province, and has the title of "King of Noodles". The technical requirements for knives and noodle kneading in Datong are relatively strict, and the skill lies in the knives. Generally, special curved knives are used. The noodles of knife-shaved noodles are thin and tough, which look like pieces of willow leaves.