C518 Medicine King Mountain

Mu Yuan flipped open the portrait, and discovered that there was still a secret compartment behind the portrait, there were many books inside. Mu Yuan took out one of them, the cover of the book was already turning yellow, and it looked to be quite some time ago, but one could still see the five black words on the cover ? ? Yan Buzhou.

Mu Yuan flipped very quickly, and then he suddenly stopped