Liangpi is divided into two categories: rice noodle skin and noodle skin, rice noodle skin is actually rice skin. Rice skin is made of rice flour, and noodle skin is made of wheat flour. It is one of the special snacks of Han nationality in Shaanxi Province.

Flour skin is the use of rice, sweet potato starch, mung bean starch, potato starch, fava bean starch, etc., made of thin slices of food collectively. There are fresh, dry two kinds, fresh instant food, dry for easy storage and transportation. Vermicelli is a traditional food made of starch.