Don't stick your chopsticks upright in the rice bowl. Instead,lay them on your dish. The reason for this is that when somebody dies, the shrine to them contains a bowl of sand or rice with two sticks of incense stuck upright in it. So if you stick your chopsticks in the rice bowl, it looks like this shrine and is equivalent to wishing death upon a person at the table!
It is polite to make noise when you have a meal,especially when you eat noodles. 的中文意思