Living people working in the underworld are called "Walking as Impermanence."Lan He mingled in the entertainment industry but, lacking connections, remained on the fringes. Initially, he refused to take on the part-time job of "Walking as Impermanence" and eating underworld meals, until he discovered... how does working in the underworld actually help in gaining fame in the living world? Lan He: It's me, the darkest rogue in the underworld, and the hottest celebrity in the living world.