[Yong Mao] Peach Capital Diary

In the vast sea lies Mount Dushuo. On it stands a great peach tree, its twisted trunk stretching for three thousand li. Among its branches, in the northeast, is the Gate of Ghosts, where all ghosts enter and leave. There are two divine men on the mountain, one named Shentu and the other Yulei, who oversee and command the ghosts. - Wang Chong of the Han dynasty, Lunheng, "Ding Gui," quoting the Classic of Mountains and Seas