R&D, production, sales and related technical consulting of mechanical equipment, electromechanical equipment and accessories; economic information consulting; self-operated and agent import and export business of various commodities and technologies (except for import and export commodities and technologies restricted by national enterprises or prohibited); sales of chemical products (excluding hazardous chemicals), building materials, metal materials, hardware, home appliances, computer software and hardware, daily necessities, knitwear, and toys.