1, wash duck eggs for later use.

2. Put soda ash and salt into a small porcelain jar and pour it into boiling water. After fully dissolving, quicklime and firewood ash are added in batches. When the quicklime is completely melted, the ash is ready, or you can buy preserved egg powder directly.

3. Sprinkle the ashes (you can add some rice husk or wheat bran) or preserved egg powder evenly on the fresh eggs.

4. It is closed for about 25 days in spring and autumn, 0/5 days in summer and 30 days in winter.

Preserved eggs are also called preserved eggs, preserved eggs and colored eggs. Named after the pattern on the eggshell, it has a mellow fragrance and is a traditional flavor egg product in China. The preserved egg is easy to peel off the eggshell, protein is solidified, and it is light green brown or brown translucent jelly. There are pine needle-like white crystals or patterns in brown protein, and the yolk is semi-solidified. Egg yolk can be clearly divided into dark green, khaki, grayish green, orange yellow and other different colors, and there is soup in the egg yolk.