Generally speaking, there is nothing to say. When two groups of people don't know each other, they just chat and ask each other, and also talk about their ancestral home, work experience, school experience and military experience. It would be better if they could pull out a few acquaintances and friends who are the same.

It is best to bring a more active, well-informed and well-connected person to the rear, so as to avoid unnecessary conflicts.

Well said upstairs, the introducer should bear the responsibility.