Personally, I think it is impossible to stop a person from speaking for too long and in writing. It seems a little inappropriate to ask "Are you here to attend wedding show" when you come, so you might as well welcome him directly, even if he doesn't want to come in, he will bear some pressure ~ ~ haha ~ and it's better to add a compliment than to sell it completely. And the most important thing is to be warm and generous in attitude and language. When people accept goodwill, it is easy to be in a daze with you ~ ~ I hope it will help you.
Was P.S. held in Shanghai recently? It seems quite grand ~