C1140 Passing the Pill Emperor's Heavenly Tribulation

The reason why Gu Xuan's explanation of the Pill Dao's method extended for so long was not only because he had comprehended some of it.

or perhaps it was because he had felt the signs of an impending breakthrough within Gongsun Shanyang's and his body!

As a result, he specially explained some of the profound mysteries of the Pill Dao that he had never intended to explain in the first place