Peeling open the eggshell, I saw crystal clear protein surface, pine flowers, looming, brown protein, orange egg yolk, such as amber with beads. This is Yiyang preserved egg, which is famous at home and abroad for its unique oriental food flavor. Pine flower is not only the crown flower for decorating preserved eggs, but also a symbol for measuring quality. This white crystal pattern is a chemical reaction of various amino acids and contains inorganic salts. It is formed by diffusion and precipitation of salts and free amino acids produced in the hydrolysis process of protein in different directions.