Only I Know the Secret of This World

This is a world where the path to immortality is cut off. Dark times have come, but hope remains. All living beings are like ants. If you want to transform a sparrow into a phoenix, sweat and opportunity are indispensable. My name is Lu An, I guard the tripod and my third sister, Refine your heart in the world of mortals, find hope in despair, I control my own life.