It means that the blue-headed duck food is very authentic, with thin skin and lots of meat, which is very delicious. According to the Nanning Bao query, if the duck skin is thick, it means the skin has a lot of fat, and if the skin is thin, it means the skin has not much fat and is very lean. The thicker skin is mostly used for roast duck, such as Peking duck and Cantonese roast duck. The thin-skinned ones are usually used in salted duck, salted duck, and stir-fry dishes. The blue-headed duck, also known as the blue-headed duck, is a bird of the genus Pochard in the family Anatidae, order Anseriformes.