The title of your post is:

Have anyone seen any Chinese tourists behaving properly before?

This implies that nobody has seen any Chinese tourists behaving properly, in other words, they’re all misbehaving.

Your body text says that you know people from the mainland, which I presume means China, and that this idea of badly behaving tourists makes you sad.

The two are in disagreement with each other.

I think you meant to ask:

“Has anyone seen any Chinese tourists behaving improperly before?”