Wheat foods are staples made from wheat flour that are steamed, wrapped or griddled, including steamed buns, dumplings and wontons, and flatbreads. Rotary stone mills appeared by the late Warring States and spread in the Han, moving wheat from whole-grain cooking to milled flour, and in the Western Jin leavened wheat food appears at elite tables. Buns are usually leavened and then steamed, dumplings and wontons wrap a filling in a thin dough skin and are boiled, steamed or pan-fried, and flatbreads are mostly griddled, baked or fried. Noodles are covered under Noodles and pastries under Pastries & Snacks.