There are many classifications of libraries, such as public libraries, university libraries, children's libraries and professional libraries. So it is doomed that its function is different, but the core is the same. Provide readers with universal and equal social services.

The library is a scientific, cultural, educational and scientific research institution specialized in collecting, sorting, preserving, disseminating and utilizing documents. Therefore, literature is the material basis of all the work of the library.

If this is your topic, you can only talk about service and literature, and then you can't go wrong!