Thanks to the book, Yang Chen had all his doubts and questions cleared. If not for the book, it would have taken him some more time to reach the level he was in since he would have to pave his own way without any guidance or system.
In any case, the books left behind by the Great Sage Emperor who had achieved unparalleled heights both in Alchemy and Soul Cultivation, became an indispensable guideline for him on how to proceed with his soul cultivation.
According to the second book, once a soul practitioner reaches the Mid Stage of Soul Formation Realm, they are barely qualified to create some of the high ranking tier 2 pills.
Being an Alchemist himself and possessing the skill of the Great Sage Emperor's Pill Vision, Yang Chen was naturally eager to try his hands at refining some pills. However, he knew that this was not the time or place.