C244 Unexpected Confession

"It isn't?" The old doctor was stunned, "But this lowly one has practiced medicine for many years, and these people have very similar symptoms to those who have been poisoned by a zhen!"

Feng Yu Heng smiled wryly, "The zhen is a type of bird that is rare and abnormal. I previously only heard about it through rumors but have never seen one. As for the poison of a zhen