Biangbiang Noodles is a type of traditional pasta in Xi'an which derives its name from the ''biang'' sound in the production process. The noodles are made of top-grade flour while the soup is mixed with soy sauce, vinegar, monosodium glutamate, Sichuan pepper and other seasonings. Take out the boiled noodles and pour with boiled vegetable oil. A piece of noodles can be as wide as two or three inches wide, as long as one meter, and as thick as a coin or as thin as the cicada wing. A single noodle is enough for a meal.