R&d, manufacturing and sales of generator sets, washing machinery, CNC machine tools, synchronous generators, pump sets, mobile pump trucks, mobile power vehicles, speakers, electrical control equipment (the above manufacturing does not include chemical products), sales of power equipment, generator set spare parts, generator set installation, maintenance and leasing (excluding financial leasing), Self-operated and agent import and export business of all kinds of commodities (except for the commodities limited by the state or prohibited import and export), photovoltaic power generation. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments)