cross-posting from GH's thread
The Columbia Encyclopedia, Sixth Edition. 2001.
or Kokiu (both: gô-j) (KEY) , town (1994 est. pop. 216,400), S Yunnan prov., China. Site of the country’s largest tin reserves, it is the great tin-mining center of China, with smelters and concentrating plants. Iron and coal are also found there, and chemicals are produced. The name sometimes appears as Ko-chiu.
Gejiu city （个旧市）skyline. It's a real small city in southwest Yunnan prvince, but quite nice looking