2. Boil the water in the pot, add the ribs after the water is boiled, and cook over high fire until foam appears. After the ribs turn white, remove them with a colander;

3. After the soup pot is washed, add the ribs again and pour in boiling water. The amount of water is based on the surface of the meat;

4. Add three tablespoons of soy sauce, and then add sugar;

5. Add ginger slices and stewed buns, cover the pot and simmer over medium heat;

6. After the soup is boiled, turn to low heat. After boiling for 40 minutes, add beans, corn and carrots and continue cooking for 10 minute. Add the right amount of salt according to personal taste.