Reincarnation involves all living beings.
A vast amount of information is required.
For example, when soul reaping in the real world, one must know which living beings have died before proceeding, right?
It also needs information to determine which type of Ghost Messenger should be sent.
Different Ghost Messengers have different responsibilities, and they can't be chosen arbitrarily; otherwise, it would disrupt the order of the Underworld, which Wang Sheng absolutely doesn't want to see.
Also, for judging between merit and karmic forces, sufficient information is necessary for the judgment, correct?
In short, information collection is extremely important for the Underworld.
With Wang Sheng's power, attempting to collect information from the entire starry sky, even the Old Land Starry Sky, is exceedingly difficult.
Moreover, collecting information is a highly sensitive matter.
Therefore, experiments must be conducted within one's controlled territory.
