 It seems that Mahan continued until it was conquered by Baekje.According to "Joseon Sangosa", the disintegration of the three Gojoseon started around 400 BC, when Yan attacked Gojoseon, and Gihu became the king of Beonjoseon.At this time, it seems that Gihu did not fall under the jurisdiction of Jinjoseon, and Beonjoseon under the Gi family became independent of Jinjoseon.