Yumen

From Mandarin 玉門／玉门 (Yùmén).

Yumen

1. A county-level city in Jiuquan, Gansu, China, formerly a county.
   • 1958, Wang, Chun-heng, “The Shensi-Kansu-Chinghai Region”, in A Simple Geography of China (China Knowledge Series)‎, Peking: Foreign Languages Press, →OCLC, page 202:

     Rich oil has been found in the vicinity of Yumen County north of the Chilien, and a new oil city has been built there.

   • 1973, Alley, Rewi, “Through the Kansu Panhandle and Down the Old Silk Road”, in Eastern Horizon‎, volume XII, number 6, Hong Kong: Eastern Horizon Press, →ISSN, →OCLC, page 20, column 2:

     After landing at Chiuchuan, we set out immediately up a macadamised highway to the oil municipality of Yumen situated up on the slopes of the Chilien Mountains in what was once known as Yumen County.

• Saul B. Cohen, editor (1998), “Yunmen”, in The Columbia Gazetteer of the World‎, volume 3, New York: Columbia University Press, →ISBN, →LCCN, →OCLC, page 3540, column 2