License Projects: Construction Project Construction; Professional Construction Operations; Construction Labor Sub-contracting (Operational projects subject to approval; details of specific business operations are based on approval results) General Projects: Sales of Building Materials; Technical Services, Development, Consultation, Exchange, Transfer, and Promotion; Research and Development of Metal Products; Manufacturing of New Building Materials (excluding hazardous chemicals); Manufacturing of Lightweight Building Materials; Manufacturing of Metal Processing Machinery; Machining of Mechanical Parts and Components; Sales of Mechanical Parts and Components; Sales of Plastic Products (except for operational projects subject to approval, independently operated and managed in accordance with the business license)