Ingredients for making hot and sour noodles: Main ingredients: 510g sweet potato powder; auxiliary ingredients: 3g alum, 15g soybeans, 20g bean sprouts, 15g celery, 10g coriander, 25g beef (lean) grams; seasoning: 15 grams of chili oil, 5 grams of soy sauce; the production steps are as follows: pour the cooked gordon paste into a basin, add sweet potato starch, 2000 grams of water, and alum water and knead into a moderately soft and hard dough for later use; star anise and Saute the ginger slices and peppercorns in oil until fragrant, then pour in the minced meat and chilli padi seeds until fragrant, add the pickled beans and stir-fry; add a little cornstarch, cooking wine, soy sauce, vegetable oil and a little water to the minced meat and stir; add Bring the broth to a boil, pour in the fermented potato starch, bring it to a boil, add vinegar and a little chicken powder over low heat, taste it and add an appropriate amount of salt according to your taste; boil the gouache in the pot, pick it into a bowl, and sprinkle Serve with celery, coriander, sprouts, crispy soybeans, and minced beef.