Luǒ mō not only is a traditional noodle of Han nationality, but also has similarities and differences with pancakes in Henan, northern Jiangsu and northern Anhui. As a kind of pasta originated in the Central Plains, steamed stuffed bun has a history of more than two thousand years. Steamed bread is made of unfermented flour into soft dough, which is rolled into a circle with a thickness of about 0. 1 cm and a diameter of about 30 cm with a rolling pin. Put it in a steamer, put a colander on it, put water in the pot, boil it, spread a cloth on the drawer, and put the rolled pancakes on the drawer.