Manufacturing of metal materials; sales of metal materials; research and development of new material technologies; manufacturing of non-ferrous metal alloys; manufacturing of metal structures; manufacturing of power facility equipment; manufacturing of general equipment (excluding special equipment); manufacturing of doors and windows; non-ferrous metal rolling processing; processing of mechanical parts and components; spray coating processing; metal surface treatment and heat treatment processing; sales of non-ferrous metal alloys; electronic weighing services; housing leasing; non-residential real estate leasing; import and export of goods; retail of musical instruments; wholesale of musical instruments; sales of musical instrument parts; manufacturing of industrial robots; manufacturing of material handling equipment; sales of artificial intelligence hardware; manufacturing of special operation robots; research and development of intelligent robots. Licensed items: manufacturing of special equipment; production of road motor vehicles; road freight transport (excluding dangerous goods).