... Aluminum Corp of China Ltd<601600><2600>, the nation's largest aluminum producer and the world's third-largest alumina producer, on Saturday signed an agreement with the government of Guizhou Province to invest up to RMB 17.5 billion in the province, foreign media reported. ... Chalco will build an alumina smelter with a capacity of 1 million metric tons and a bauxite plant in the province. ...