C24 The Waist Tag and the Rules

On the way back, Ouyang Yuye had been immersed in the study of the Ten Imperial Powers and was unable to extricate himself from it. The deeper he studied it, the more he felt that this martial skill was extraordinary. Master Guu had already taught him all of the heart techniques and insights of the Ten Imperial Powers. What was left was his own research.

Master Guu's meaning was quite clear