Public libraries generally need ID cards, military officers' cards, passports and other valid documents. Some want photos and some don't want to collect them on the spot. This is based on the requirements of the library.

A library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared. Library has the functions of preserving human cultural heritage, developing information resources and participating in social education. Library is the external storage and selective transmission mechanism of social memory (usually expressed in written records).