弘宇股份：公司目前的主营业务是农用拖拉机提升器的研发、生产和销售

Core Viewpoint - The company, Hongyu Co., Ltd., focuses on the research, production, and sales of agricultural tractor lift devices, emphasizing future growth through technological innovation and product optimization [2] Group 1: Business Focus - The main business of the company is the development, production, and sales of agricultural tractor lift devices [2] - The company plans to enhance its core competitiveness by optimizing existing products and exploring new applications in other fields [2]