Engages in steel structure engineering; foundation and substructure engineering; construction and design of decoration engineering, waterproofing, anti-corrosion, and thermal insulation projects; earthwork, municipal road engineering, landscaping engineering, water conservancy and hydropower engineering, civil engineering, environmental protection engineering, fire protection engineering, and sports facility construction; operation and rental of construction machinery and equipment; subcontracting of construction labor; sales of steel structures, corrugated culvert pipes, guardrails, stationery, steel, household appliances, furniture, building materials (excluding sand and stone), and hardware products. (Operate as permitted by relevant departmental approval.)