Licensed Projects: Civil aircraft maintenance, Design and production of civil aircraft parts, Road freight transport( Does not contain dangerous goods)( 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: Mechanical and electrical equipment manufacturing, Mechanical and electrical equipment sales, Electrical equipment repair, electronic、 Mechanical equipment maintenance( Excluding special equipment), Electronics sales, Sales of labor protection products, Air transport cargo packaging services, General cargo warehousing services( Does not contain hazardous chemicals or other items that require licensing and approval), loading and unloading, Non-residential real estate rentals, Industrial control computers and systems sales, Retail of computer software, hardware and auxiliary equipment, Information technology consulting services, Communications equipment manufacturing, Software Development, Pump and vacuum equipment manufacturing, Pump and vacuum equipment sales, 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)