General items: Sales of high-quality special steel materials; Non-ferrous metal alloy sales; Metal structure sales; Sales of metal products; Research and development of metal products; Sales of labor protection articles; Wire and cable business; Sales of electrical equipment; Wholesale of hardware products; Sales of metal materials; Conference and exhibition services; Estate management; Enterprise management consulting; Technical service, technical development, technical consultation, technical exchange, technology transfer and technology promotion; Metal daily necessities manufacturing [branch operation]; Metal structure manufacturing [branch operation]; Metal cutting service [branch operation]; Metal processing machinery manufacturing [branch operation]; Manufacturing of arts and crafts and ceremonial articles (except ivory and its products) [branch operation]; Import and export of goods; Technology import and export. (In addition to the projects that need to be approved according to law, the business activities shall be carried out independently according to law with the business license)