Yuzhou City, Henan Province has a large planting area of sweet potato, and farmers have a tradition of processing sweet potato vermicelli. Pure sweet potato vermicelli is made of high-quality fresh sweet potato starch, degreased and purified by advanced technology and refined by traditional technology. Pure sweet potato vermicelli contains no artificial pigment, is a kind of green natural food, soft and delicious, rich in nutrition, suitable for cooking and storage, and is known as "artificial shark fin". It is soaked in boiling water for 5- 10 minutes before eating. It can be cold, stewed, fried and scalded, or it can be made into a special stew in Yuzhou. . Eat one more dish, which is delicious in color, flavor and taste, suitable for all ages. Braised pork is a local snack in Yuzhou, Henan Province. The starch ground from special sweet potato, local specialty Yuzhou vermicelli, chopped green onion and water are mixed together to form a thick paste, which is piled into a disc shape and placed in a steamer, and steamed to dark green by high fire. How to cook braised pork: main ingredient: vermicelli 500g; auxiliary material: sweet potato powder 250g, pork (fat and thin) 100g, egg100g; Seasoning: 15g vegetable oil, 3g pepper, 5g cooking wine, 4g soy sauce, 8g sugar, 4g salt, 2g monosodium glutamate and ginger. 2. Cut the onion and chop the ginger; 3. Chop pork, add vegetable oil, Jiang Mo and chopped green onion and fry for later use; 4. Add egg liquid, salt, pepper, cooking wine, spiced powder, sugar, monosodium glutamate, minced meat and sweet potato powder (sweet potato powder) into the sweet potato vermicelli, mix well and steam in an oil pan for 30 minutes.