Others say that he has come back from a business trip. What should he say?

When someone says that he has come back from a business trip, you can reply according to the situation and relationship:

1. Q&A: Wow, that's great. You must have enjoyed your trip, right? Did you get anything from the trip?

2. Share the reply: It's good to travel. I want to go too. Can you share some of your photos with me?

3. In-depth discussion Reply: What do you think of this trip? What impressed you the most about the places you have been?

The above replies are for reference only, and you can choose the appropriate reply method according to the actual situation.