Yanpi is a wide vermicelli made from sweet potato starch.

In the Sichuan dialect, the word "蕕" refers to "red potato". Because the wide vermicelli is very wide, it is called "pi". Over time, the wide vermicelli made from sweet potatoes is called "蕕PI", which is the same as the "pi". Liangpi has a similar name, and in some places it’s great for soup or cold salad.

The appearance of sweet potato skin in hot pot restaurants is relatively late. Before the sweet potato skin, the most popular vermicelli was a kind of vermicelli that was narrower than the sweet potato skin. It was also a kind of sweet potato flour. The method was basically the same as the sweet potato skin. Because it is often used to cook hot pot, Sichuan people just call it "hot pot noodles".

The sweet potato skin is made of high-quality sweet potatoes and potato starch, as well as domestic advanced production equipment. During the product processing, the raw materials are vacuumed. It is a top-quality dish for various soup pots and hot pots; it is used with stir-fried twice-cooked pork and boiled meat for Chinese food, and can also be made as a cold dish with a unique flavor.

Roasted sweet potato skin is a vegetarian skewer that is rarely seen outside Sichuan and Chongqing. Sweet potato is actually a sweet potato, and the sweet potato skin is a crust made of sweet potato flour. Grilled in a pan until the skin is slightly wrinkled, brushed with sauce, then wrapped with kimchi, radish and chopped green onion, and skewered into skewers. The taste is very unique.