2. Even if the cold preserved eggs are put in the refrigerator, there is still a chance of being invaded by bacteria, which is Salmonella. Preserved eggs can provide enough nutrition for Salmonella, and the bacteria will multiply rapidly, even if they are kept in the refrigerator at low temperature, they will still invade. Therefore, Mawang Encyclopedia reminds that cold preserved eggs must be eaten early, and leftover preserved eggs should not be eaten for more than 2 hours.