in the late 197s and early 198s, the rural areas in southwest Shandong province just implemented the land contract system reform for a few years. Every time they are busy with farming, some families, such as my family, will invite relatives and friends to help with farm work. In order to thank the people who helped me and save time, my family would ask me to buy some ready-made cooked food from the collection after school, simply cut it and get some meals to the ground for everyone to eat. In general, I will buy some roast beef, chop suey, preserved eggs, biscuits, meat boxes and fried buns. After returning home, peel the changed egg and cut it into several pieces, add some vinegar, ginger foam and sesame oil to mix it, and slice the cooked meat as a dish; Burn a few pots of boiling water and palm some jasmine tea. zai buys several bottles of Laoshan soda and two bottles of Shanxian Laojiao wine as a diet. Put it in the basket together with the staple food such as sesame cakes. Take baskets to the fields for adults to eat.

It's very delicious and is a famous food in the surrounding villages. The word "changed egg" is explained by the Chinese Dictionary as "pinyin bian? Dan, preserved eggs ". In fact, the preserved eggs in southwest Shandong are not the same as the preserved eggs. It is a Shandong specialty and a traditional flavor egg product of the Han nationality. The raw materials needed for the production are fresh eggs, quicklime, drinking water, sawdust (or wheat bran), and sometimes a small amount of edible salt, pepper, aniseed, etc. are added to improve the taste. The whole production process of Henan preserved eggs does not use lead-containing materials, so it belongs to lead-free preserved eggs. The principle of making preserved eggs is to heat the eggs with lime powder and sawdust according to the fact that quicklime will be heated when it meets water. Cooked eggs are golden and elastic in appearance, and can still be eaten even if they accidentally fall to the ground and are washed with water when shelled. Wang Shixiong, a famous doctor in the Qing Dynasty, said in the Diet Spectrum of Living with Interest: "Changing eggs, which are pungent, astringent, sweet and salty, can purge heat, sober up, remove fire from the large intestine, cure diarrhea, disperse and astringe." It is a good summary of the characteristics and effects of changed eggs.

how was the original preserved egg made? It is said that about 2 years ago, a rich family in a village in Tianjin, his son made a coffin for his mother, and put it in an empty house for later use. After a long time, the mother was still alive, so he ordered his family to sprinkle lime and plant ash into the coffin to prevent moisture, and left a big gap in the coffin cover for ventilation. Forget it when it's over. The following year, when her mother died, she moved the coffin to the grave and found more than 1 eggs in the plant ash. The dutiful son was so angry that he took it out and threw it dry. The shell broke and became a dark brown transparent crystal inside, which was very confusing. Some good people dared to taste it, and it was delicious. The onlookers also thought it was strange, so they rushed to taste it, and it was like this. Those who have insight will follow suit afterwards and put fresh eggs in lime and plant ash, and so on. As a result, the neighborhood followed suit and called it "color-changing egg".

"lead-free preserved eggs" does not mean that there is no lead, but that the lead content is lower than the national standard that the lead content per 1g of preserved eggs should not exceed 3 mg. Therefore, it is better for children to eat less preserved eggs, and it is not a problem for adults to eat them occasionally, but they should not eat them for a long time.