Lu Yao delivers food during the day and "takes orders" to exorcise ghosts at night.
Fellow heavenly masters laughed at him for not being popular, but they didn't know that he had an ancestral "Encyclopedia of the Underworld".
Once, a fierce female ghost came to the door and demanded her life. Lu Yao opened the book and said, "Sister, you owed my ancestors a meal three hundred years ago."
The female ghost was stunned: "Then, can I scan the code?"
