WEBThe Amur became especially prominent in the period of the Sino–Soviet political split of 1956–1966. For many [quantify] centuries, inhabitants of the Amur Valley comprised the Tungusic (Evenki, Solon, Ducher, Jurchen, Nanai, Ulch), Mongol people, some Ainu and, near its mouth, the Nivkhs. [22]