Ye Han's gaze was fixed intently on the pool of medicinal liquid, judging whether the extraction had reached its absolute peak based on its color and fragrance.
If the extraction time was too long, the medicinal properties would be compromised; if it was too short, residues would remain. Determining the exact timing for the extraction tested an alchemist's true foundation. An alchemist had to rely on the color of the liquid and the aroma it emitted—a technique Ye Han had learned from the *True Alchemy Canon* and was now putting into practice.
Swish!
Chapter 487