The Study About The Formation Of The Natural Border River During The Early Period Of Joseon Dynasty

In 10 to the middle of the 15th century AD,from the Liao,Jin to Ming Dynasty of China,with the period of the ancient countries of the Korean peninsula from Goryeo Dynasty to Joseon Dynasty successively conducted a total of more than five centuries of the northern territory ' s expansion:among them,from the former of implementing the"Northing's Strategy" to the latter of implementing the "Northing' s New Strategy",from the former in peninsula northwest territory ' s expansion to the latter for territory ' s expansion in the northeast region of peninsula;from the former only expand the south bank of the middle and lower reaches to the Yalu river,to the latter extend to almost the entire "Yalu-Tumen" two rivers in its southern bank of the main stream;from the former in the south bank of the middle and lower reaches the Yalu river has only a handful of city which main city,to the latter in the south bank of all fronts essentially built the "Four Countries and Six Towns",which was the main city on behalf of the "Riverside' s Defensive System".In the end,through two generations of the"Northing",made both Sino-Korean sides of the Yalu river and the Tumen river from now on became a foregone conclusion as the situation of"natural boundary line".In the process from the "Northing " to the boundaries of formation:The expanding consciousness was root.This consciousness was inheriting the former dynasty and fully combined with their own unique needs,which formed causing Goryeo Dynasty to pose as the role of Goguryeo's successor,to focus on the "restore" the northwest territory near "Xi jing" Pyongyang;and then make Joseon Dynasty to focus to "recover" the "ancestries' territory" in the northeast as own duty."Northing" always was the main line.It was the eternal theme of Goryeo Dynasty and Joseon Dynasty continued to obtain the territory.The period of Goryeo Dynasty had the pure "Northing' s Strategy",which skillfully grabed the territory by first time;The period of Joseon Dynasty,with going deep into expanding the territory,was subject to the changes of international situation and frontier' s environment,but still had the "Northing' s New Strategy",which was implemented preferentially in the defense for the purpose.Setting up the "Four Countries and Six Towns" was the key as the focus of this article.The end of Goryeo Dynasty,the king of GongMin was "against the Yuan Dynasty" in an effort to expand the territory.From then on,new Joseon Dynasty continued its new venture as the foundation.From AD 1398 to 1449,on the basis of inheriting the existing territory of the former generation,Joseon Dynasty had been proceeding the new territory 's expansion:Kyongwon(1434 AD),Hoeryong(1434 AD),ChimeCity(1441 AD),Onseong-gun(1441 AD),Kyougaun(1443 AD),Puryong(1449 AD)the "Six Towns",and CiCheng(1433 AD),LvYan(1435 AD),MaoChang(1442 AD),YuRui(1443 AD)the "Four Countries".Among them,especially setting up the "six towns" was the most complicated,and so was also the top priority of interpretation of the article.Although the history of setting up each country and each town were not identical,but eventually as all roads lead to Rome,namely defensive as the"affiliation".And it was this "affiliation",making the early forms of the "Yalu-Tumen" boundary.The establishment of the "Riverside' s Defensive System" was to establish the ultimate sign of borders.It was the final product of the"Northing' s Strategy",consisted of two elements,containing the"backbone" cities along the river as the "Four Countries and Six Towns",and all kinds of auxiliary project as "Riverside' s Defensive Auxiliary System".Its composition,especially the overall function of the defense concept of "integration",is analogous to the same period of the Ming Dynasty' s "Great Wall defensive system",but not completely.Which not only lay in its "backbone" city city as the core elements of system components,but also had more labeled "Northing" vested achievements and the purpose of dividing the boundary.Therefore,since the construction of "Four Countries and Six Towns",especially Pyongan and Hamgyong entering the overall defense arrangement after 1440 AD,with expanding the territory deeply,its overall form and scale was in constant perfect,in order that basically established the pattern as the "Yalu-Tumen" boundary until the middle of the 15th century.But was still in the process,as the masters of the dynasties in ancient China,especially in the Ming dynasty,it was always to Goryeo Dynasty and even Joseon Dynasty keeping the manner as "indulge" and"the attitude of indifference".After two rivers becoming the border of Sino-Korean,from then on,in the form of being established by usage inherited until today.The stability of inheritance,had far-reaching historical significance with regard to the two countries in political,military,economic,cultural,and other aspects,and furthermore,had a decisive influence towards more about the Sino-Korean of boundary's affairsfor later generations.