Licensed Projects: Import and export of goods, Technology import and export( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business items are subject to the approval results.) General Projects: electronic、 Mechanical equipment maintenance( Excluding special equipment), Machinery and equipment sales, Architectural decoration、 Manufacturing of plumbing pipe parts and other metal products for construction, Hardware product manufacturing, Hardware wholesale, Metal cutting and welding equipment manufacturing, Metal cutting and welding equipment sales, Metal structure manufacturing, Metal structure sales, Instrument sales, Metal material sales, Security system monitoring services, Digital video surveillance system sales, Electrical machinery and equipment sales, Electronic components and electromechanical assembly equipment manufacturing, Sales of electronic components and electromechanical components( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)