The catalog of the Underground Chamber is very rich. The following are some of the categories of works that may be included in the Underground Chamber: - Fantasy novels: Including various fantasy, xianxia, science fiction, and other types of novels such as " Battle Through the Heavens "," Martial Arts Move the Universe ", etc. - Wuxia novels, including traditional Wuxia novels such as Tianlong Ba Bu, Lu Ding Ji, etc. - [Metropolis novels: Including various modern metropolis novels such as Why the Silent Flute, A Smile Is Alluring.] - Science fiction: Including various science fiction novels such as " The Three-Body Problem " and " The Wandering Earth." - Historical novels: Including various historical novels such as Ghost Blows Out the Light, Grave Robber's Chronicles, etc. - Horror novels, including various horror novels such as Thriller Paradise, Ghost Crying Ghost, etc. - Other novels: Including all kinds of other types of novels such as Doujin novels, fantasy comics, etc. Due to the wide range of works in the Underground Secret Room, it is impossible to determine the specific works of the catalog, but it can only provide some possible classifications.