Tuesday to Sunday 9: 00 -2 1 p.m. Closed on Mondays. Haikou Library is a public library in Haikou City, Hainan Province, located at No.68 Binhai Avenue, Longhua District, Haikou City. With a building area of about 34,000 square meters, this library is one of the largest public libraries with the most complete facilities and the richest collections in Hainan Province.