Stone skin is a thin layer of skin, which makes the chicken skin very crisp after roasting. Stone-skinned chicken is a traditional roast chicken dish in China. This crisp stone skin is made by coating chicken skin with special seasoning and then baking at high temperature. In the baking process, the oil in the chicken skin gradually dries, and at the same time, it is combined with the applied seasoning to form a crisp skin, which is as hard and brittle as a stone, so it is called "stone skin".