They seemed to have a limit as to how far they could reach, and judging from how calm and expressionless the woman was… she clearly wasn't aware of such an aura.
"Where did you find this?"
"I have an entire mine that my family built a business and living around. We sell it to Chinese warlords and, of course, the emperor, who loves this substance so much that he ingests it directly."
"Umm… That is not something he should be doing. This stuff is dangerous… it gives me a bad feeling."
"Well, it enhances medicine to such a potent degree that without the proper additives and suppressants mixed into the medicine you're trying to make, you could very well kill somebody. So, even if people get their hands on this substance, they can't do much without our secret technique… and that is what I will be teaching you right now."