Community library. Dushu Lake Library, located on the bank of Dushu Lake, is a modern city library based on digital library, which embodies the concept of knowledge exchange and integrates the functions of traditional libraries. Borrowed books can be returned in the community library. The purpose is to preserve borrowed books and materials, spread and share all kinds of knowledge, and promote social, economic and cultural development. Books in Dushu Lake Library can also be borrowed and returned from other places.