1. Salted duck eggs can nourish yin and tonify kidney. Compared with eggs, duck eggs have a stronger smell. After pickling with salt water, the fishy smell can be removed. In terms of taste, salted duck eggs are more fragrant, tender and delicious. From the point of view of traditional Chinese medicine, salted duck eggs are cold and cool when they enter the kidney. After curing, they have the effect of nourishing yin and tonifying kidney. 2. Salted duck eggs can clear lung fire and reduce yin fire. Traditional Chinese medicine believes that salted duck eggs have better effects of clearing lung fire and reducing yin fire than salted duck eggs, and cooking can cure diarrhea. Among them, salted egg butter has the effect of improving eyesight and nourishing eyes. And salted duck eggs are delicious.