This is a world that cannot be touched by humans. It can be said to be the Nine Yins, or the underworld. To put it bluntly, it is the underworld.
He is the first secretary of the underworld, stern, harsh, cold, but also sunny (a smile hides a knife) and philanthropic (a letter is tragic).
This is another world, a world beyond one's reach.
You Xing: "Welcome, welcome to the underworld. Have you made any mistakes in your life? Get ready for the trial to begin."