Reforging an entirely new Netherworld Underworld was a massive undertaking for any powerful figure.
The Netherworld Underworld was deeply bound to the countless billions of living beings throughout the heavens and void.
Every piece of foundational construction within the Netherworld Underworld, even every alteration to its laws and regulations, could bring about countless consequences.
Thus, if this matter was handled well, it would naturally bring majestic fortune and boundless merit.
If it was handled poorly, the resulting karmic sin would naturally be immense.
Fortunately, Zhang Jian had once served as Empress Houtu's chief secretary and had personally rebuilt the Netherworld Underworld of the Immortal Court Heavenly Realm, so he was well practiced in the matter.
Yet considering the Heavenly Spirit Realm's unique path of cultivation, Zhang Jian still made several adjustments to its Netherworld Underworld. He permitted certain deities who had cultivated the Netherworld Dao, the Dao of Life and Death, or the Great Dao of Reincarnation to establish divine kingdoms there, but they had to remain under the Netherworld Underworld's supervision. Moreover, ghosts and living beings passing through the various Netherworld divine kingdoms or other deities' divine kingdoms had to be judged for good and evil before the Underworld's Sin-Reflecting Mirror Platform. If a deity violated the rules and helped an evil ghost escape the Netherworld Underworld's punishment, that deity had to bear the punishment in its place and accept chastisement.
With the Netherworld Underworld's fairly successful model already in hand, Zhang Jian had no intention of trying to be original or inventing something new in such a matter.
Using the Lesser Heavens Samsara Method, he temporarily condensed a phantom of the Reincarnation Millstone. Then, using the Golden Chapters of Nine Nether Life and Death, he condensed the supreme treasure known as the Book of Life and Death,