Although the Ming and Chosŏn states recognized the Yalu River (K. Amnok River) as the demarcation of their territories, this boundary was far from a static and distinct line free of controversy and rivalry. Throughout the fifteenth to seventeenth centuries, the two governments and their subjects increasingly encountered and interacted on the dotted river islands of the lower reaches of the Yalu River, a region that easily lent itself to mutual exploitation and inhabitance. This led to substantial contestations and negotiations concerning territorial security and border separation between the two states. Past scholarship has paid attention to the related historical facts, including the advancement of Ming military projects toward eastern Liaodong and the anxiety this issue brought to the Chosŏn authorities, and the fluctuant cultivation of the Yalu River islands and their disputable territorial ownership. These research results understand Ming-Chosŏn relations within an impact-response framework, regarding the latter as being

中文翻译：

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扩张、竞争和边界的形成：朝鲜朝鲜与明朝在鸭绿江地区的边界关系

尽管明朝和朝鲜王朝都承认鸭绿江（K. Amnok River）是其领土的分界线，但这条边界远非一条没有争议和竞争的静态和明确的界限。在整个十五至十七世纪，两国政府及其臣民在鸭绿江下游星罗棋布的河流岛屿上越来越多地接触和互动，该地区很容易相互开发和居住。这导致了两国之间关于领土安全和边界分离的大量争论和谈判。过去的学界关注相关史实，包括明朝辽东军事项目的推进，以及这个问题给朝鲜当局带来的焦虑，以及鸭绿江诸岛的波动耕作及其领土归属问题。这些研究结果理解了影响-响应框架内的 Ming-Chosŏn 关系，将后者视为