Peng Huaisheng, chief executive officer of Chinalco Mining Corp. International, speaks during the company&#39;s initial public offering news conference in Hong Kong, China, on Thursday, Jan. 17, 2013. Chinalco Mining, a unit of China’s biggest aluminum producer, plans to raise as much as $435 million in an initial public offering in Hong Kong to fund its copper project in Peru. Photographer: Jerome Favre/Bloomberg via Getty Images