Tolong jelaskan mengenai Yeonbaek (연백, 延白) dari Hwanghae (Republik Korea)

19 myeon: Gwaegung, Geumsan, Dochon, Mokdan, Bongbuk, Bongseo, Seoksan, Songbong, Onjeong, Yongdo, Unsan, Yugok, Euncheon, Haeryong, Haeseong, Haewol, Honam, Hodong, Hwaseong