John's Test. Chinalco Yunnan Copper Resources (CYU) is exploring tenements in Queensland for copper, gold and uranium. It is also actively drilling highly prospective tenements in Chile as well as Laos. This strategy is supported and assisted by CYU's cornerstone shareholder, Yunnan Copper Industry (Group) Co Ltd. (YCI) which is China's third largest copper producer. YCI supports CYU's role as YCI's international investment arm and mining house. Queensland