1. Up to 3 days, 4-5 days in the refrigerator is not a problem. But longer than that, it's not fresh, it may not smell bad, but it definitely doesn't taste fresh, and I'm sure it's already overloaded with bacteria if it's tested.

2. Without any treatment: room temperature at room temperature 2-3 days, refrigerator 4-5 days. If it is salty, it can be kept for a few more days. It is best not to leave it for a long time.

Benefits of eating eggs:1. Eggs are more resistant to hunger. Eggs are more hunger-resistant than bread, buns, cereals, etc. The protein and fat in them provide you with a steady supply of energy that keeps you full longer.

2. Eggs help with weight loss. Studies have shown that people who eat eggs for breakfast are more likely to lose weight than those who eat pancakes.

3. Eggs are an excellent source of protein. Eggs contain all the essential amino acids, making them the most complete protein.

4. Eggs are cost-effective. Compared to other protein-rich ingredients, such as bacon, eggs are much more cost-effective, even if they are not cheap.

5. An egg won't raise your cholesterol. Eggs do have a certain amount of cholesterol, but there are also components in eggs that help lower cholesterol. As long as you keep the number of eggs you eat to one a day, you won't increase your risk of heart disease.