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Where are Yunnan’s major tin deposits located?

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Yunnan: Yulongxue Mountain — Yunnan Pavilion atop Yulongxue (“Jade Dragon Snow”) Mountain, near Lijiang, Yunnan province, China.

Yunnan province contains some of the world’s largest tin deposits, which serve as the foundation for the province's leading extractive industry. These deposits are primarily located in two regions:1

Southeastern Yunnan: The city of Gejiu is the site of China’s most important tin-mining operation.2
Western Yunnan: Significant deposits are also found west of the Lancang River.1