Production, sales and after-sales service of continuous casting crystallizer copper plates and metallurgical machinery and equipment; purchase and sale of copper tubes, electromechanical products, alloy products, non-ferrous metals, and technical services; maintenance of continuous casting crystallizer copper plates and metallurgical machinery and equipment and accessories; export of the company’s own products and technologies and import of machinery and equipment, spare parts, raw materials and technologies required by the company, except for commodities and technologies that the state restri