The living environment in the underground world is becoming increasingly difficult. In order to pursue the hope of survival, people in the fourth realm have gone through many selections to come to the upper realm to survive.
Their deaths will become underground nourishment for the upper class people, maintaining the survival of this world.
"Do you know what's in the first realm?"
"There is happiness, joy, endless songs and endless poems."
Xu Yi smiled for no reason.
"Then do you know what is in the fourth realm?"
He seemed to be recalling his past.
"There is torture, pain, endless wails and mountains and fields of graves."
Purpose: Try to survive