Yang Kai has a pretty contradictory personality. When others ask him a question, he loves to act all mysterious and rarely answers or gives a straight answer. There have been scenes where side characters have pointed that out. But he himself asks very straightforward questions and no doubt will be pissed off if not given equally straightforward answers. You'd think he would be more subtle to hide his ignorance, considering he loves to act wise and mysterious, but nah. He doesn't mind looking like an ignoramus. Contradictory indeed.