Xue Yang laughs at his own misfortune. If this man wants to be serious he knows he doesn't stand a chance so all he can do is see just how much he wants revenge for his death.

"How nice that you felt the need to come say hello."

Xue Yang might have been just the blade that did the dirty work but he still was part of it. Knew of the plan and had carried through with the request instead of turning it down. He knows that he is just as guilty and still holds no remorse about it.