"Correct," Old Zhang nodded. He dealt in medicinal herbs, but he had been interested in the medical field since he was a child and naturally knew a lot about it. If he hadn't lacked the talent, he would have become a doctor long ago.
"This is indeed a Gu Worm. Aside from the Gu Doctors of the Southern Border, no one else would craft such evil creatures," Old Zhang said solemnly. "Mr. Su, could it be that a Gu Doctor has provoked you?"
Su Han was a descendant of the Ancient Medical Sect, possessing divine medical skills, which naturally couldn't be compared to those of a Gu Doctor. In fact, it could be said that Su Han's medical skills were meant to save lives, whereas the Gu Doctors used theirs to harm people.
Gu Doctors from the Southern Border were adept at using Gu to harm others, even to control women for their own pleasure and to make sturdy men work for them. There were many who used it to kill, their malevolence extreme to the core.