There are many reasons for eating salted duck eggs. 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. Not only that, duck eggs still have good nutrition after pickling. It is rich in fat, protein and various amino acids needed by human body, and also contains various minerals such as calcium, phosphorus and iron, and various trace elements and vitamins necessary for human body, which are easily absorbed by human body. In addition, the fat in raw egg yolk can't be seen to contain oil because it is combined with protein. After curing for a long time, protein will be denatured and separated from the fat, and the fat will gather together and become egg butter. The greasy salted duck eggs are a sign of good curing. 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 function of improving eyesight and nourishing eyes, and can also treat children's food accumulation. External use can treat burns and eczema. There are two ways to make salted duck eggs: find fresh duck eggs with uniform size, wash them, wrap them with yellow mud or grass ash mixed with water and salt, then put them in an altar with a small mouth and a big belly, seal them for a month, or soak them in salt water directly, or take them out and cook them. After the former is cooked, you can see that the yolk is naturally leached with red oil and the yolk is fine sand; The oil yield of the latter is much lower than that of the former, and the taste is not as delicate as the former. Salted duck eggs are a tonic for those with yin deficiency and fire flourishing. Although suitable for all ages, some people should not eat more, nor should pregnant women and people with insufficient spleen yang. Moreover, salted duck eggs have high salt content and should not be eaten more. Drink more water after meals.