Why was the man surprised to see the woman?

W: Hi, Ed.
M: Hello, Jane. It’s so nice to see you again this year. Didn’t you say you would teach in Shanghai last term?
W: Yeah. It was because of my husband. His company was going to move to Shanghai but his boss changed his mind. I am glad to continue teaching in this school. I like this place.
M: Me, too! The schoolmaster is friendly. And I think he knows how to run the school well.
W: Yes. I also like the good relationship between colleagues. They are help-fill.
M: And the kids are very lovely.
W: Yeah, I love them too. By the way, which grade are you going to teach this year?
M: Grade 10.
W: Really? I teach Grade 10, too.