Aluminum Corporation of China (CHINALCO) is a key state-owned enterprise directly supervised by the central government and engaged in mineral resource development, non-ferrous metal smelting and fabrication, and related trading, as well as engineering and technical services. It is the world's second largest alumina producer and the third largest primary aluminium provider. It operates in more than 20 countries and regions. Its total assets reach nearly 500 billion yuan and its sales revenue in 2014 amounted to nearly 300 billion yuan.