As the name implies, dough is an incomplete dough making process, that is, dough is half cooked.
So why use undercooked noodles? We all know the famous "Goubuli Steamed Bun" in Tianjin. The skin of this kind of steamed bread is steamed with fresh meat and water and stuffed in a half-baked bread. The purpose of using half-baked flour as skin is to make this kind of steamed bread have the sweetness of dough and retain the fresh juice of stuffing.