Square cold rice noodles, one color square is stuffed skin. The stuffing is soft and smooth, sour and delicious, refreshing and appetizing. It is a special food of Han nationality popular in northwest China, and it is very popular in Qinghai, Gansu, Ningxia, Shaanxi, Hetao and Inner Mongolia. Stuffed skin is a kind of dough steamed with flour syrup. There are two kinds, one is ordinary padded leather and the other is high-load padded leather.