On Taobao, soda ash and salt are first put into a small porcelain jar and poured into boiling water. After the two are fully dissolved, quicklime and firewood ash are added in batches. When the quicklime is completely melted, the ash is prepared. 3. Apply the ash (add some rice husk or wheat bran as appropriate) evenly on the fresh eggs. 4. Preserved eggs will be preserved after being stored for about two months.