You Say Living Quietly to the End of My Life Is a Life Simulator?

Li Chengfei transmigrated to a world of immortal heroes and martial arts. As an ordinary mortal, he thought his knowledge from a more advanced era would let him cheat his way to immortality. He never expected danger to lurk everywhere. Mortals who sought immortality all met terrible ends. Li Chengfei tread carefully at all times and never put himself in danger. Carrying endless regrets and a longing for eternal life, he kept his head down until he died of old age. And then... “A dream of Nanke. Life simulation ended. Preparing to restart...” Li Chengfei: “???” He jolted upright on his deathbed. Turns out I’m the one with the cheat!