The Yalu River (Chinese) or the Amnok River (Korean) is a river on the border between China and North Korea. The Chinese name comes from a Manchu word meaning "the boundary between two countries".

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They are known as the hero tree, because a euphrates poplar can live for a thousand years. Even after it dies, it stands upright for a thousand years, and even after it falls, it stays intact for another thousand years. I like euphrates poplar because they symbolize the resilience of the Chinese nation.

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