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Is the county in the northeastern part of Busan Metropolitan City. To the east, East Sea, to the west, Gyeongsangnam-do, Yangsan-ri, Hyeon-myeon to the north, Ulju-gun, Ulju-gun, Onyang-eup, Seo-myeon-myeon, and southwest to Haeundae-gu and Geumjeong-gu to Busan. In 1914, the Gyesang army was absorbed into the Dongrae army, then transferred to the Yangsan army in 1973, and the Gyesang army was rebuilt in 1995 and transferred from Yangsan-gun, Gyeongsangnam-do to Busan. The county seat is located in Gijang-eup, and the administrative district is 2 eup and 3 ei. Kajang-eup and Jung-gwan-myeon are being developed as residential areas, and the Kori Nuclear Power Plant and Southeast Nuclear Power Academy are located in Changan-eup.