Electrical switches and equipment, electric water heaters, kettle heaters, electrical switch parts, electric heaters, water treatment systems, solar water heaters, pumps, air conditioners, instruments and meters, kitchen equipment manufacturing and processing (manufacturing and processing are limited to branch operations), sales; development of boilers and auxiliary equipment, energy-saving and environmentally friendly equipment; boiler installation (installation is limited to branch operations); import and export of all kinds of goods and technologies through self-operation and agency (except for goods and technologies that the state restricts or prohibits import and export by the company); wholesale and retail of hardware tools, steel, building materials, decorative materials, mechanical and electronic equipment, office supplies, clothing, footwear, household appliances, electronic products, computer software and hardware as well as auxiliary equipment. (As may be required by relevant departments, approval from the administrative authority is available.)