Yalu River

Wade-Giles romanization  Ya-lü Chiang , Pinyin  Yalu Jiang , Korean  Amnok-kang  river that forms the northwestern boundary between North Korea and the Northeast Region (Manchuria) of China. The Chinese provinces of Kirin and Liaoning are bordered by the river. Its length is estimated to be 491 miles (790 km), and it drains an area of some 12,259 square miles (31,751 square km). From a mountainous source in the Ch'ang-pai Mountains, the river flows southwestward to drain into