How to talk when drinking with your uncle?

Drinking with my uncle should pay attention to the following aspects:

If you don't understand what your elders are saying, it's enough to replace it with a simple smile, and keep your speech in a normal state, otherwise you will be restrained. When speaking, elders should not look around or secretly do some small moves.

If a respected relative talks in Kan Kan at the dinner table, and you don't agree with what he said, don't deny it immediately, but summarize what the elder said first, and then end it with some guiding methods.