"With these three things, the last step is purification. However, purification requires activated carbon, and I don't have much on hand right now; I can only give you a few hundred kilograms."

"Activated carbon?"

Sun Simiao frowned upon hearing this.

"What is this, and how is it different from ordinary charcoal?"

Upon hearing this, Li Jue quickly offered an explanation.

"Brother Hui, activated carbon looks the same as ordinary charcoal, both being black charcoal. However, it has more internal pores, so the same volume of activated carbon can adsorb dozens or even hundreds of times more impurities than ordinary charcoal."

"However, the refining of activated carbon is very complex and needs to be completed under high temperature and high pressure conditions."

"I've only refined a few batches so far..."

"Oh oh oh..."

While the two chatted as if no one else was around, Li Shimin stood by and listened attentively.

But after listening for a while, he realized with dismay that he hadn't understood a single word.

What is penicillin?

What exactly is this thing for?

"Let me interrupt you for a moment. What exactly is the use of this thing you're researching?"

Upon hearing this, Li Jue glanced at Li Er in surprise, then two greedy glints appeared in his eyes.

Why should I be stupid enough to follow my senior brother in trying to make money? Isn't there a golden pig right in front of me?

"Grandpa, do you know why wounded soldiers are so prone to dying?"

Li Shimin nodded upon hearing this, then shook his head.

"I know a little about it. It's said that people mainly die from festering and suppurating wounds. But now that we have your high-proof alcohol, the number of deaths from festering wounds has decreased by 70-80%."

Li Jue smiled faintly upon hearing this.

"Grandpa, would you like to save the last one or two percent of the injuries?"

"What?"

"Da Sun, are you sure you can save him?"