Then put soda ash and salt into a bowl and pour in boiling water. After fully dissolving, quicklime and firewood ash are added in batches. When the quicklime is completely melted, it can be turned into ash.

Then put the duck eggs one by one into the ash wrapped with pickled preserved eggs;

Finally, cover the surface of duck eggs stained with feed ash with eggshells or wheat bran, and finally store them in a cool place.

Preserved eggs are not only delicious food, but also have certain medicinal value. Wang Shixiong's "Resting Diet Spectrum" said: "Changing eggs, pungent, astringent, sweet and salty, can purge heat, sober up, purge large intestine fire, cure diarrhea and disperse astringency." Traditional Chinese medicine believes that egg degeneration can cure eye pain, toothache, hypertension, tinnitus and dizziness. Everyone can eat it: fire is the most suitable; Children, people with spleen-yang deficiency, people with cold-dampness diarrhea, patients with cardiovascular diseases and patients with liver and kidney diseases should eat less.

Note: Preserved eggs should not be eaten with soft-shelled turtle, preserved plum and brown sugar. Usage and dosage: Jiang Mo and vinegar should be used to detoxify preserved eggs; Preserved eggs are best eaten after being cooked. Preserved eggs also contain lead, so children should eat less. Not suitable for storage in the refrigerator.