Awakening the Yin Emperor, I Want to Rebuild the Underworld

Black and White Are Impermanent, the Underworld, the Cloudy Emperor

Re-Establish Heaven or Underworld in a Systematic Way

The protagonist travels to a place where there is no heaven or underworld. The protagonist has a system that allows the protagonist to establish heaven or underworld step by step and become the master of heaven or underworld.

There Is No Female Protagonist. the Male Protagonist Is the Yin Emperor of the Underworld, Who Is Super Powerful. There Is No Book About the Holy Mother.

I hope the male protagonist can travel through time, have an underworld system, and be almost invincible.