evidence: The current situation of the Yalu River Estuary on the China-North Korea border: North Korea's territory is gradually increasing. Could the Yalu River become an inland river in North Korea? Title: "River Water, Red Dust: The Historical Evolution of China's Border and Friendly Neighbor Relations" In the millennium of border river disputes, the Yalu River has witnessed the changes in the fate of China and North Korea and has gone through ups and downs. North Korea not only gained territory, but also gained a rich history. This is a story about land and friendship, and a deeper exploration of humanity behind border disputes. [...] Boundary Agreement: During the Qing Dynasty, the Yalu River boundary dispute had not yet been settled. Numerous proposals and disputes are ongoing. It was not until 1962 that China and North Korea found a compromise and demarcated the river boundary to the red earth mountains and rivers. This is a delicate geopolitical balancing act.