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: Manufacturing of special equipment for environmental protection, Dust removal technology equipment manufacturing, Air pollution control, Coal-fired flue gas desulfurization and denitrification equipment manufacturing, Mining machinery manufacturing, Mining machinery sales, Special machinery manufacturing for building materials production, Special equipment manufacturing( Excluding licensed professional equipment manufacturing), Construction machinery manufacturing, Construction machinery sales, Special equipment repair, Foreign contracting projects, Metal ore sales, Bearing sales,Metal material manufacturing, Metal material sales, Metallurgical special equipment manufacturing, Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)