R&D, production and sales: high-voltage electrical switches and equipment, electronic products, communication equipment, electronic components, plastic products, mechanical hardware; providing maintenance and technical consultation for the above products; operating the export business of the company’s self-produced products and the import business of mechanical equipment, parts, raw and auxiliary materials required by the company (without separate import and export commodity catalogues), except for goods and technologies that are restricted by the state or prohibited from import and export.