_The method used to boil the soup is: put the appropriate amount of water in the soup pot, add the ribs, the duck kidney and the carrot, boil and put in the watercress, boil on high heat for 10 minutes, simmer for 90 minutes, turn off the heat and put salt to taste
_Try the salt first, because the duck kidneys have a salty taste. The duck kidney can also be sliced and then boiled in soup, or sliced after the soup is boiled, which is also very sweet. Watercress has a sweet and cool taste, has the effect of clearing the lungs and moisturizing the lungs, and the kidneys of the duck are warm and sweet, and have the effect of strengthening the spleen and rationalizing the stomach and intestines
_During the Spring Festival, the food is stagnant, or the fire is hot and dry, and it is best to drink this soup