Practice: Slice 500g beef, add a spoonful of starch, appropriate amount of soy sauce, cooking wine and salt, stir well and marinate for 20 minutes. Boil the water in the pot, cook the beef for 2 minutes, take it out, add minced garlic, Chili noodles and green peppers, pour hot oil, sprinkle sesame seeds, add appropriate amount of soy sauce, aged vinegar, salt and oyster sauce, and finally add coriander and stir well.