I Have a Book of Underworld

I have a book of underworld, where I can travel between the yin and yang realms. In this world where ghosts exist, I became a slightly unusual ghost exorcist, dealing with ghosts every day. I have lived for who knows how long, but I always look like I am twenty years old. Even I don't know whether this is a curse or a God-given opportunity. Catching zombies, killing ghosts, sitting and drinking tea with Black and White Wuchang, my story has just begun. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.