South Manganese Investment Limited, an investment holding company, engages in manganese mining, ore processing, and downstream processing operations in Mainland China, Asia, Europe, and North America. It operates through four segments: Manganese Mining, EMM and Alloying Materials Production, Battery Materials Production, and Other Business. The Manganese Mining segment mines and produces manganese products, including manganese concentrate, and natural discharging manganese powder and sand. Its EMM and Alloying Materials segment mines and processes ores used in hydrometallurgical processing activities for the production of electrolytic manganese metal (EMM) and manganese briquette, and pyrometallurgical processing for the production of silicomanganese alloys and ferromanganese. The Battery Materials segment manufactures and sells battery materials products, including Electrolytic Manganese Dioxide (EMD), manganese sulfate, lithium manganese oxide, and lithium nickel cobalt manganese oxide. Its Other Business segment trades in various commodities, such as manganese ores, EMM, manganese alloys, and non-manganese metals, as well as sells scraps, rents investment properties and leasehold lands, and invests in companies engaged in the mining, production, and trading of non-manganese metals. It also manufactures and sells equipment, develops properties, and produces sulphuric acid and steam. The company was formerly known as CITIC Dameng Holdings Limited and changed its name to South Manganese Investment Limited in February 2021. South Manganese Investment Limited was incorporated in 2005 and is headquartered in Admiralty, Hong Kong.