When you peel off the eggshell, you can see the crystal clear egg white surface, looming pine blossoms, brown egg white, and orange yolk, like amber with beads. This is Yiyang Songhua Preserved Egg, which is famous both at home and abroad for its unique oriental food flavor. Songhua is not only the decoration of preserved eggs, but also a symbol of quality. This white crystal pattern is a chemical reaction of various amino acids and contains inorganic salts. It is formed by the diffusion and precipitation of salts and free amino acids generated during protein hydrolysis in different directions.