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Sinuiju (sēn´ŏŏ´ē´jōō), Jap. Shingishu, city (1993 pop. 326,011), W North Korea, on the Yellow Sea (or West Sea) at the mouth of the Yalu River. A main northern gateway to Korea, it developed from a logging center into a port and rail terminus. A bridge (built 1910) over the Yalu connects it with NE China. It has air, rail, and road ties with Pyongyang. In World War II it became an industrial center with manufactures of chemicals, aluminum, and textiles. Power comes from the huge Supung Dam. In 2002 the North Korean government announced plans to develop a special economic zone in the city.