Salted duck egg is a preserved food mainly made of fresh duck eggs, containing rich nutrients such as fat, protein, various amino acids, calcium, phosphorus, iron, various trace elements and vitamins that are needed by human body and they are easy to absorb. With a moderate salty flavor, it is popular among all ages. It is also called “the green egg” because of its green and smooth eggshell. Salted duck egg, a remade egg with a special flavor, is ready to eat and can serve as a delicious condiment whose color, flavor and taste are quite appealing.