For some raw materials, especially frozen meat, many of them have no production date, and many merchants will change them manually, so customers don't know what's wrong with these foods when they eat them, and we can't see them when we order takeout.
Then there is the composition of the food. I believe everyone has eaten a lot of strange things in takeout. Steel balls in hair are the most common, not to mention something excessive. It is said that takeout is unhealthy, but for many workers who can't cook and have no time to eat, they can only choose to eat these foods for a long time, and they have to sit all day without extra time for exercise. Therefore, eating high-fat food for a long time will make your body worse or even fatter.
And some small shops. Although we say that there will be disinfection cabinets when we walk into the restaurant, some of them are actually just furnishings. Many of them are washed and put in by themselves, and sometimes they may be dried with rags, so these are very unsanitary, but they are often invisible when ordering takeout. There must be a lot of bacteria in it.