General Projects: Steel rolling processing; Manufacturing of photovoltaic equipment and components; Sales of photovoltaic equipment and components; Manufacturing of metal fittings for construction; Sales of metal fittings for construction; Sales of metal materials; Manufacturing of metal materials; Sales of building materials; Wholesale of hardware products; Sales of machinery and equipment; Manufacturing of metal structures; Sales of metal structures. (Except as otherwise required by laws and regulations, the company operates independently and autonomously in accordance with the business license).