The effect of watercress and preserved kidney in pork bone soup is to clear heat and moisten the lungs, strengthening the spleen and nourishing the stomach.

The broth of watercress is moist and delicious, and watercress and preserved duck kidney are very nutritious. The watercress has the effect of clearing the lungs and moistening the dryness, expelling phlegm and relieving cough, opening the stomach, cooling the blood, diuretic, etc.; waxed duck kidneys can strengthen the spleen and clear the stagnation, promote the appetite, so this soup has a very good role in reducing the fire. And then with the pork bone, this soup has a clear heat and moisten the lungs, the effectiveness of the stomach and intestines, especially for the dry cough without phlegm, dry mouth and throat, toilets are not smooth, the stomach is not good for the elderly children to take.