The nutritional components of preserved eggs are quite similar to those of ordinary eggs, and the curing process is subjected to the action of strong alkali, so protein and lipids are decomposed, which makes them easier to digest and absorb, and cholesterol becomes less. And the iron agent is used for curing, so the iron content is also high. However, vitamin B group and essential amino acids were destroyed.
So preserved eggs are good, but you can't eat more.