From the point of view of saving food, the surplus leftovers should be packed and taken home, and should not be thrown away. It can be eaten in restaurants and at home, and many dishes have not been touched, so there is no hygiene problem. Some people are embarrassed to pack because of face problems.
Of course, there are also some very rich people who don't care about this waste. After all, it is a minority. There are also some publicity reports that do not advocate eating leftovers. That's because they don't consider the poor and don't know that growing food is very hard.
CD-ROM action, how much to eat is still conducive to saving and reducing waste.