1. Store in the refrigerator: Low temperature in the refrigerator is the best way to preserve food. Boiled eggs can be kept in the refrigerator for 3~4 days if they can't be eaten at one time, but not for too long.

2, salt water preservation: eggs are soaked in cold salt water, the salt concentration in salt water is high, which has inhibitory effect on many fungi, so cooked eggs can be preserved for 2~3 days.

3. Eggs, also called chickens lay eggs and chickens lay eggs, are laid by hens. There is a hard shell outside, and there is an air chamber, egg white and egg yolk inside. Rich in cholesterol and nutrition. An egg weighs about 50g and contains 7-8g of protein and 5-6g of fat. The amino acid ratio of egg protein is very suitable for human physiological needs, easy to be absorbed by human body, with a utilization rate of over 98% and high nutritional value, and it is one of the foods that human beings often eat. It contains a high content of protein.