1. Put salted duck eggs in a pot of water. If the salted duck egg sinks, it means it is raw. If they float on the water, they are cooked and can be eaten directly.

2. Put the salted duck eggs on the table. If you can turn, it means you are ripe; If it can't turn, it is raw.

3, duck eggs are sweet and cool, have the function of nourishing yin and clearing the lungs, and enter the lungs and spleen; Has the effects of nourishing yin and blood, moistening lung and beautifying skin. It is suitable for patients with physical weakness, dry and hot cough, dry throat and sore throat, hypertension, diarrhea and dysentery after illness. Used for diaphragmatic fever, cough, sore throat and toothache.