C390 Smart Zhang Fan'er!

When Yan Yun took out the miraculous medicine, Pei Yuan Dan s, to strengthen and nurture the body, Ni Xi did not move.

However, right now, he was moved by the bone in his hand as he gasped in surprise.

The others didn't understand, but Yan Yun had some understanding of it. This leg bone looked ordinary, but it came from the prehistoric era