What is Seppi?

Niangpi is a traditional specialty food popular in northwest China, which is soft, smooth, sour and spicy, refreshing and appetizing. It is very popular in Qinghai, Gansu, Ningxia, Shaanxi, Xinjiang and Hetao, Inner Mongolia. Stuffed skin is a kind of dough steamed with flour syrup. There are two kinds of fermented skins, one is common fermented skins, and the other is high-load fermented skins. "Niangpi" and cold rice noodles are the same food, but they are different because of the dialect in different regions.