Salted duck eggs are generally made from fresh duck eggs by pickling, and salted duck eggs belong to cooked food, so the shelf life of salted duck eggs is generally about 5- 15 days, while salted duck eggs stored for one year have already deteriorated, so they cannot be eaten.

Methods of selecting salted duck eggs:

Good-quality salted eggs have a clean shell and a slight trembling feeling when shaken. After peeling off the eggshell, they have a moderate salty taste and good oil flavor. When picked with chopsticks, butter emerges, and the yolk is divided into layers, with the color getting deeper and redder with each layer. However, poor eggs have dark shells with white or black spots, which are easily broken and have a short shelf life. After peeling, the protein is soft, rotten and salty.