What should I do when I go out to eat with my family and face an unfamiliar uncle and aunt?

In fact, I think we should be more lively in the face of unfamiliar uncles and aunts. Because those are your friends and elders, we are all children in front of them. If you are too silent, they will think you are impolite, so you should greet them warmly, and then say hello more when eating food.