If the ingredients in the sandwich include a lot of fresh ingredients, such as boiled eggs, tomatoes and lettuce, it is easy to breed bacteria and the shelf life is short. The cold storage time cannot exceed one day.
If the ingredients in the sandwich are cooked ham, bacon, dried meat floss, seaweed and other processed foods, the shelf life of sealed refrigeration can be relatively long, usually about 2-3 days.
"Su-style mung bean soup" is a memory of Suzhou people growing up, and many people have never eaten this kind of mung be