The Research of Locations of Koryo Ablok river, Koryo Euiju, Heunghwajin, Uiwonjin, Jeongju, Yeongdeok, Yeongsak, Jeongyung and Koguryo Capital Guknaeseong Part 1

The main purpose of this research is to clarify the northwest borderline of Koryo by finding the area of 6 Jus in the right side of the Koryo Ablok river(now Daling river in China) in the age of Koryo Kingdom. We first show that in Part 1 Research, Koryo Ablok river is now Daling river in China, the administrative authority of Koryo Euiju is now Daeyusubojin in China, Heunghwajin is now Bukgin Si in China, the castle Guknae Winaamseong is the old castle located at the right hand side of Jinyinpuzicun in China and Koguryeo Capital Guknaeseong is the neighborhood with radius 20 Li cetered at Jinyinpuzicun in China. by referring to the books that deal with history such as the History of The Three Kingdoms(Samguk Sagi), Koryosa, Koryosa choryo, Geography of Koryo, the Revised and Expanded Edition of Survey of the Geography of Joseon, Byeongj, Seongbo, Geography of Liao Dynasty. In Part 2 Research, we show the accurate place of the particular places of Euijumok.