Congo is Africa's largest miner of copper and the 240 megawatt dam in the town of Busanga will power Sicomines, a nearby copper and cobalt mining joint venture between the Chinese companies and Congolese state miner Gecamines.

Sicomines is the mining side of a $6 billion minerals-for-infrastructure deal signed in 2007, under which Sinohydro and China Railway Group pledged to build $3 billion worth of infrastructure in return for a 68 percent stake in the mine.

They are busy worldwide, ensuring secure supplies of metals by financing & building infrastructure in return for interest in mines.

Since KWG has offered 50% of their interest in chromite mines to local First Nations, China Rail isn't going to get anything close to a majority stake in those mines in exchange for their financing & building a railway. If they are satisfied with a watertight offtake agreement & a guaranteed supply of chrome, ferro-chrome, or chromite, shareholders will be happy.

Here's alink to the article about their deal with the Congo

http://www.iol.co.za/business/companies/china-to-fund-drc-power-plant-2034626