Landscape Engineering, Greening Engineering, Civil Engineering, Interior and Exterior Decoration Engineering, Construction Installation Engineering, Municipal Engineering, Earthwork Engineering, Waterproofing Engineering, Corrosion Protection Engineering, Insulation Engineering, Environmental Protection Engineering, Lighting Engineering Construction; Sale of Computer Hardware and Software, Electronic Products, Hardware and Electrical Appliances, Auto Parts, Building Materials, Decorative Materials; Sale and Rental of Trees and Flowers; Sale and Installation of Machinery and Equipment, Electromechanical Equipment; Labor Service Provision