Hot and Sour Rice Noodles

Known as "the best noodle in the world", "Hot and sour rice noodles" is a widespread traditional snack in Chongqing urban and rural areas. It's mainly made from sweet potato powder. There are two kinds: one is "water noodle" which is made from sweet potato starch; the other one is "dry noodle" which is processed into dry powder strip.