Yalu River

The Yalu River flows southwest from the northern Korean mountains to Korea Bay, forming a long boundary with the lands of Liaodong and Manchuria. Near its lower course, Ŭiju became an important centre for exchange across the frontier. In 1593, during the Japanese invasion of Korea, a market was opened at Chunggang opposite Ŭiju for trade with Ming China. The river finally spreads into the shallow waters of the Yellow Sea.