He was indeed very curious about what Fan Wu had come to do here.
That way, he could have at least some mental preparation to face some, not so good events that might happen.
"Simply passing by." Fan Wu cracked a smile, "While passing by, I figured I'd see if something interesting would come up."
"Oh?" The old envoy was stunned, "And what if something does come up?"
Fan Wu said, "It depends on if it interests me. If it does, I'll get involved; if not, I'll ignore it."
As for what counted as 'interesting,' it was purely about whether there were Free Attribute Points for him to snatch.
If there were, he naturally took an interest; if there weren't, then naturally he did not.
Daoist Priest Fan was just that pragmatic!