Chinalco,the biggest aluminum manufacturers in china,announced recently that they had signed a memorandum with Guangxi Nonferrous Group.Two parties will incorporate a joint-venture and plan to co-develop rare earth resources in Guangxi province. Chinalco, the biggest aluminum manufacturers in china, announced recently that they had signed a memorandum with Guangxi nonferrous Group. Two parties will incorporate a joint-venture and plan to co-develop rare earth resources in Guangxi province.