Cheongnyangni 588 is a red light district in Seoul, South Korea near Cheongnyangni station. It's similar to the famous red light district in Amsterdam, Netherlands.The commom name for this district is Oh Pal Pal as in Korean Oh stands for 5, Pal for 8. This is named after a bus which once passed through this area.
The Cheongnyangni district is mentioned in several works of fiction and non-fiction as the setting for a crime drama Seoul: Lost in the big city (ISBN 978-0956476517) and also in the book In Search of Life (ISBN 978-0956476500).