Licensed Projects: Railway locomotive and vehicle maintenance, Railway rolling stock design, Construction Engineering Design( 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: Railway transportation infrastructure equipment sales, High-speed rail equipment、 Accessories Sales, bearings、 Gear and transmission parts sales, Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion, Metal product sales, Railway locomotive and vehicle parts sales, Rail transit special equipment、 Sales of key systems and components, Sales of rail transit engineering machinery and parts, Railway rolling stock sales, Railway transportation equipment sales, General equipment repair, Motor vehicle repair and maintenance, Mechanical parts、 Parts Sales, Mechanical equipment research and development, Machinery and equipment sales, Professional design services, Sales of metal chains and other metal products, Metal product repair, Metal product research and development, Rubber product sales, Sales of forgings and powder metallurgy products, Sales of high-quality special steel materials, Metal structure sales, Special equipment repair, Sales of special electronic equipment, Development of rail transit operation management system, Information system integration services, Domestic trade agent, Import and export of goods, Technology import and export( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)