First, you can't knock on the bowl with chopsticks when eating. You can't knock on the bowl with chopsticks when eating. This is basic table manners. When visiting other people's homes, especially if you can't do this, the host will think that serving food too slowly is disrespectful to them. In addition, when eating out, knocking on the bowl with chopsticks is still a way of booing, giving people a vulgar feeling, so it should be a basic etiquette to master knocking on the bowl without chopsticks.
Second, when eating, you can't put chopsticks in the bowl vertically. We often see that when offering sacrifices to ancestors or gods, chopsticks will be inserted in bowls or meat, which is a way. Therefore, it is unlucky to put chopsticks in a bowl in daily life. Whether eating in your own home or being a guest in someone else's home, you can't put chopsticks in a bowl.
Third, don't pick up the chopsticks. Chopsticks can't fit into the bowl. How should I put them? If you eat at home, just lay it flat on the rice bowl, but when you eat outside, you should put it on the plate obliquely, with the head of chopsticks facing the food and the tail of chopsticks facing yourself. Don't pick up the chopsticks when you drop them. Unhealthy and unlucky. If the chopsticks really fall in place, say happy, homophonic chopsticks fall. This is a way to show good luck.