2, salted duck eggs, China specialty. In ancient times, it was called fairy. Folk customs are also called salted duck eggs, salted duck eggs and green eggs. Salted duck eggs have a long history in China, and are deeply loved by ordinary people, and are also favored in the market. Salted duck eggs are produced in many parts of the country, but only Jiangsu Gaoyou salted duck eggs are the most famous. Yuan Mei's Suiyuan Menu has a preserved egg: Wuxi's preserved egg is the best. Salted duck eggs, made from fresh duck eggs, are rich in nutrients, such as fat, protein, amino acids, calcium, phosphorus, iron, trace elements and vitamins. Easy to be absorbed by human body, with moderate salty taste, suitable for all ages. The eggshell is blue, round and smooth, also called "green egg". Salted duck egg is a kind of reproduced egg with unique flavor and convenient eating. Salted duck eggs are good food with good color and flavor.