First, the names are different, one is called tendon-cutting noodles, and the other is called donkey hoof noodles. Second, the scope of representation is different. Rib-cutting surface refers to all kinds of rib-cutting surfaces. The donkey hoof surface is just one of them. Third, the hardness of dough is different. The rib cutting surface is generally hard. Donkey's hoof surface is softer. Fourth, the shape is different. The rib cutting surface has a strip shape. A donkey's hoof is shaped like a donkey's hoof.