There is a place at the end of the world called the Dead Sea. The water of the Dead Sea is infinite water, and ghosts drown in it; this shore is called the end of life, and the other shore is called the place of immortality. Legend has it that there lives an immortal in the Indestructible Place, an elf with the body of a fish and a tail. On the other side, it saw the lights of the world reflected on the sea. After seeing some things, it was sad and cried, so it weaved the sea into yarn, turned the tears into beads, and used threads made from sea water to thread pearls, and embroidered all the lamentable things. So it was named Zhihaizhi.