Jeong Yak-yong, a famous realist of the late Joseon Dynasty (1762-1836), was exiled here. For the eleven years here, he wrote lots of books. Dasan, which is his pen name, established his political and scholarly achievements as a favorite of King Jeongjo but was banished for eighteen years due to his faith, Catholicism. He wrote about 500 books including Mongmin simseo (Admonitions on Governing the People), Gyeongse yupyo (Design for Good Government), and Heumheum simseo (Toward a New Jurisprudence). Yeoyudang jeonseo (A collection of Jeong’s literary works), which puts together all his works, presents the academic direction concerning philosophy, laws, religion, medicine, musical art, astronomic phenomena, measurement, and architecture. It contributed academic establishment as a worldwide research material. For the old cottage broken down, the association for keeping the Dasan relics took the initiative in rebuilding the thatched cottage in an old site. The little and simple house toward the south has a tablet marked “Dasan Chodang (Thatched Cottage on a Tea Mountain)” hanging. He inscribed "Jeongseok (丁石)" on a rock over the hill from the back of the house. There is also a small pond located on the left side of the house; in the front yard is pure stone to make tea, which gives us a glimpse of what his life in exile was like.