Sonbong County, formerly called Unggi (Hangul: 웅기, Hancha: 雄基), is a subdivision of the North Korean city of Rason. It is located at the northeastern extreme of North Korea, bordering Russia and China. It lies on Unggi Bay, an extension of the Sea of Japan (East Sea of Korea). A uranium mine is allegedly located there, as is a 200 megawatt oil-fired power plant. The word Sonbong means "Vanguard" in Korean.