That belongs to the rules of the Lesser Underworld.
"Like you, I also think this Underworld Monarch Fang is from the Zhanling Court. You can all take some time to inquire and see who he actually is."
Huang Qingque mused, "If we find the real person, treat him well. I will negotiate with him personally. The Lesser Underworld is very special; if it can be completely grasped in our court's hands, it will surely yield wondrous results."
Chapter 469