The act of remaining idle while secretly observing the concoction processes of each Zenith was quite a task. Alchemy was a culmination of continuous successes and minute failures leading to great products or horrendous outcomes, so a single moment of inattention could leave gaping holes in proper knowledge and understanding.
Wei Wuyin was relying heavily on his vast stores of mental energies and his Second Mind, dividing the task of observing them, while utilizing his unparalleled perception of the Void and mental fluctuations to gather every fragment of information that was both internal and external.
Throughout Wei Wuyin's life, while he had momentary half-teachers, such as Wu Yu and Wu Jiao, much of his comprehension, understanding, methods, and knowledge were gathered through records, scrolls, tomes, and books properly categorized, formatted, and elaborated on by either himself or his Second Mind.
