The bun used for the meat sandwich is baigi bun, which is made of good flour kneaded and shaped into a cake and baked in the fireplace. The bun is characterized by a crispy outer skin and a soft, creamy interior, with an excellent taste. Meat buns are usually made with a combination of foreleg and pancetta, and the foreleg is popular because it has the right proportion of fat and leanness. For example, in Shaanxi, there is also the use of baklava buns, "meat buns".