🇨🇳 Jiayuguan (嘉峪关市; 嘉峪關市; Jiāyùguān Shì) is a prefecture-level city in north-western Gansu province. Its built-up area is made of Jiayuguan City and Suzhou urban district of Jiuquan City now being conurbated. It is named after the nearby Jiayu Pass, the largest and most intact pass of the Great Wall of China. Jiayuguan is a major industrial city. It was established in 1958, following the establishment of Jiuquan Steel Company, the largest steel company in Gansu. Mining and mineral processing are the primary industries of the city. By area, it is by far the smallest prefecture-level division of Gansu.
The fortress at Jiayuguan is situated at the end of the portion of the Great Wall of China which was built by the Ming Dynasty, in the 14th century.