主营产品：Road engineering, construction engineering, communication pipelines, drilling engineering (excluding mine exploration) construction, fire protection facility installation and construction, decoration design and construction, landscaping engineering design and construction, engineering design consulting; traffic engineering facilities, building materials, steel, Sales of wood, cement, hardware accessories, and road maintenance materials; production, processing, and sales of asphalt (cement) concrete, (color) asphalt cold patching materials, asphalt sand, joint tapes, and joint grouting adhesives; advertising design and agency release, and machinery and equipment leasing ; Freight forwarding, logistics and distribution; general freight. (Projects that require approval according to law can only carry out business activities after approval from relevant departments).
主营产品：Research and development of solar energy technology and electric power technology, transfer of technological achievements, and construction of solar photovoltaic system engineering.
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