The library is a public place, which usually collects all kinds of books, periodicals, newspapers, audio materials, video materials, electronic resources and so on. The secret of a library usually refers to some unknown and hidden information or knowledge. This information or knowledge may be related to the history, source, value and protection of the library.

If you have questions about a particular library, you can ask the librarian or library staff, who are usually willing to help and answer your questions.