C601 It Was Impossible to Tell

Xu Ranxu nodded thoughtfully before remarking, "Hmm, I'm starting to regret it now. Had I known earlier, I would have made him my apprentice."

"Forget about it; he's already my apprentice," came the swift reply.

"Do you really think there's anything left for you to teach him?" Xu Ranxu asked Guan Changfei with a probing look.

Guan Changfei was taken aback by the question