C1699 I don't know I don't know

I don't know.

"Whether I can find this place or not, I'm just guessing right now. I naturally know of yin-yang river. Otherwise, it would be useless for me to be a devil exterminator. "

"What?" After talking for half a day, you still don't know where yin-yang river is! " Xiao Yu shouted unhappily at the side.

This Xiao Yu was so infuriating that he could piss off the old man