The Chicago Public Library is a relatively early public library in the United States. It is also a relatively large public library in the United States. It is located at 400 South State Street in Chicago. It is located in the city center. It is accessible by bus and has convenient transportation. The library is open to everyone free of charge, with a total of seven floors. It is divided into sections according to children's reading room, audio-visual materials, novels, periodicals and newspapers. It has a very rich collection and is open-shelf borrowing. Every floor of the library has a reading room, which is very tidy and quiet. The reading environment here is very good. Librarians are also friendly and patient to ask them questions.