When I was in college, when I was eating in the canteen, I saw many people put chopsticks directly in the bowl for convenience. Seeing this situation, I usually avoid eating and don't sit in a row with him. In fact, the reason is very simple. Putting chopsticks in a bowl is for the dead, similar to burning incense for ancestors.
If you have attended a funeral, you will find a bowl of rice or steamed bread with chopsticks or incense on it on the desk, which means that the deceased will not be hungry after going down.
In addition, in ancient times, the last meal for death row inmates was like this. The reason why death row inmates are given this kind of food is because they are given incense and their faces are here, so that they will not return to the person who sent him food after death.
In modern times, some customs have been forgotten by people, but it is naturally very unhappy to say that finding someone serving you such a meal means sending yourself on the road. So we should know some customs so as not to violate other people's taboos. When eating, don't wave chopsticks left and right, turn them upside down. When you see someone else holding food, you should pay attention to avoid it and prevent "chopsticks fighting".
When eating, you should not lick the attachments on chopsticks with your tongue, nor put chopsticks in your mouth, nor push bowls, plates and cups with chopsticks. No, you can't poke chopsticks in front of others when they are eating, and you can't point them at others.
When using chopsticks, you can't use them backwards. If you use your tail as the head of chopsticks, you will be looked down upon. This must not happen. Chopsticks can't be crossed on the table. If you cross chopsticks at the dinner table, it is a total denial of others at the same table and a disrespect for yourself.