Gansu

UK: /ˈɡænˈsuː/ US: (gän′sy′)

WordReference Random House Unabridged Dictionary of American English © 2025

Gan•su  (gän′sy′), n. [Pinyin.]

1. Place Names a province in N central China. 12,650,000;
   137,104 sq. mi. (355,099 sq. km). Cap.: Lanzhou.

Also, Kansu. 

Collins Concise English Dictionary © HarperCollins Publishers::

Gansu / ˈɡænˈsuː/, Kansu noun

1. a province of NW China, between Tibet and Inner Mongolia: mountainous, with desert regions; forms a corridor, the Old Silk Road, much used in early and medieval times for trade with Turkestan, India, and Persia. Capital: Lanzhou. Pop: 26 030 000 (2003 est). Area: 366 500 sq km (141 500 sq miles)