1, half a catty of beef hind legs, one tablespoon of cooking wine, six to seven tablespoons of sweet potato powder, one tablespoon of soy sauce, half a tablespoon of soy sauce, a little pepper, 30g of shredded ginger, half a tablespoon of aged vinegar, a little baking soda, a little chopped green onion and three small bowls of beef soup.

2. First cut the beef into thin strips and add sweet potato powder, soy sauce, soy sauce, aged vinegar and baking soda. Grab it hard and beat it on the chopping board for a few minutes to let all kinds of ingredients penetrate into the beef better.

3. Loose the beef with good taste by hand, so as to prevent it from turning into meatballs when cooking, and let it stand for about ten minutes.

4. Boil the beef soup, then add the shredded ginger. After one minute, turn to low heat. Put the beef piece by piece, stir in the pot, cook for three to five minutes, and turn off the heat until the soup boils.

5. Finally, add pepper and chopped green onion to taste.