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, Mongolian Kalgan, city (1994 est. pop. 615,300), NW Hebei prov., China, near a gateway of the Great Wall and on the Beijing-Russia RR.
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(also Changchiak’ou), a city in North China, in Hopeh Province, in the valley of the Yang Ho (Huang Ho basin). Population, 1 million (1970). Kalgan is a highway junction and has a station on the Chingpao Railroad, which runs from Peking to Paot’ou. Industry includes ferrous metallurgy (at the Lunyang Metallurgical Combine) and machine building (the production of mining equipment, geological prospecting instruments, and ball bearings); the city also has a viscose factory and food-processing and glass enterprises. Iron ore is extracted at the Lunyang deposit near the city, and hard coal is also mined nearby.