3M Innovative Properties Co. acquires and manages intellectual property right. It engages in the acquisition and ownership of the intellectual property rights to the products designed and manufactured by its parent company 3M Corporation. The company was founded on May 10, 1999 and is headquartered in Roseville, MN.

Tibet Zhongchi Group Co., Ltd., established on 2005-05-10, Operating scope includes sound barriers,Noise and Vibration Control Equipment,muffler design,manufacture,processing,Install;channel,Comprehensive corridor,flood plate,Embedded casing,Evacuation platform,Track damping products,Design of track sound-absorbing panels,Flood Control Products,manufacture,processing,Install(branch only),railway engineering,Metro light rail construction project,Railway Engineering Design,Railway Engineering Information Consulting Service and Environmental Assessment,Information Consulting Service and Environmental Assessment of Metro Light Rail Construction Project;Environmental protection construction engineering professional construction;Steel structure construction engineering professional construction;Anti-corrosion and thermal insulation construction engineering professional construction;Municipal professional construction engineering design;Environmental engineering construction project special design;Special Design for Steel Structure Construction Engineering;Green maintenance;Technology development in the field of new material technology,technology transfer,technical consulting,Technical Services;Electrical Equipment,Installation of HVAC equipment;Engaged in the import and export of goods and technology.[Items subject to approval by law,The project can only be operated after being approved by the relevant department]

Zhengsheng Environmental Technology Co., Ltd., established on 2008-03-25, The scope of business includes consulting on environmental protection engineering and noise and vibration control related industries,survey,supervision,Design and Construction;Acoustics and Radiation Technology,Material,Process and product research and development,experiment,Testing and Production,Sales,Install;Environmental assessment and technical services;Municipal utilities and environmental engineering,Mechanical and electrical installation,light steel structure,Metal doors and windows,Intelligent building,Special professional engineering design and construction;Import and export of goods and technology;design,Research,Production,Sales,Install;Air Filtration and Purification Equipment,Dust filtration and purification equipment;Air Pollution Control Services;Construction and decoration engineering construction;Comprehensive utilization of solid waste;Product line development,design,integrated,Assembly and sales;Chemical Products(Does not contain hazardous chemicals)promotion of;gravel sales.Ecological protection engineering construction;River infrastructure construction;Electronic and intelligent engineering construction;Fire engineering construction;Soil Pollution Control and Restoration;Solid Waste Treatment;Design of smart city systems,Install,debugging,technical maintenance;Information system integration service;Information Technology Consulting Services;software development;Refractory series products(Free of Hazardous Chemicals)promotion of.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).

Jiangsu Xinguang Environment Protection Engineering Co. Ltd., part of Changzhou Tiansheng New Materials Co., Ltd., is a Chinese company located in Jurong. The firm manufactures environment protection equipment and materials. Changzhou Tiansheng New Materials Co., Ltd. acquired Jiangsu Xinguang Environment Protection Engineering Co. Ltd. on July 31, 2014 for $88.22 million.

China Railway Design Group Co., Ltd., established on 1992-07-21, The scope of business includes undertaking surveys of foreign and domestic-funded projects,consult,Design and Supervise Projects;Equipment required for the above projects,Material export;Contracting and strength,scale,country with performance(territory)Foreign engineering projects;External dispatch of the department's survey,consult,Design and supervision labor personnel;In the country(territory)Hold various enterprises abroad;Manage the export business of the company's self-produced products and technologies and the machinery and equipment required by the company,spare parts,Import business of raw and auxiliary materials and technologies(Except for the goods and technologies that the state restricts the company to operate or prohibits the import and export of);Undertake domestic engineering survey,surveying and mapping,consult,design,supervision,EPC,Engineering pile detection and geological disaster prevention engineering construction projects;Consulting services related to the above business;Construction project bidding agency business;Railway Bridge Verification;Soil and Water Conservation Scheme Compilation and Environmental Impact Assessment of Construction Projects;Surveying instruments and drilling rig maintenance;Rental business of self-owned houses;Engineering Design of Public Security Technical Protection System,construction;General cargo;The following limited branch operations:stay(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Shanxi Junhao Industrial Co., Ltd., established on 2010-08-18, Business scope includes new building materials,Energy saving and environmental protection materials,bridge accessories,expansion joint,Sound barrier,Anti-corrosion accessories for railway concrete beams,waterproof material,Ultrasonic testing tube,Technology development of electronic products,Processing and sales;distribution:building materials,metallic material(No precious metals),decorative material,electronics,Construction machinery equipment and accessories,Fire equipment,Clothing and shoes,hardware products;Realtor;construction project(Building Construction):building engineering,Environmental Engineering,Steel structure engineering,Municipal Engineering,Road construction,Construction mechanical and electrical installation engineering;City and road lighting engineering;Municipal Road Engineering;Sewage treatment project;Landscaping project;Road Maintenance Service;computer,Repair of office equipment;General Cargo Warehousing;Loading and unloading service;Construction machinery and equipment rental;Import and export;Technology Import and Export.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Hengshui Yutiexin Environmental Protection Engineering Co., Ltd., established on 2007-11-29, The scope of business includes the construction of engineering environmental protection facilities;Construction of engineering steel structure facilities;Metal Mesh Products,isolation fence,Sound insulation and noise reduction environmental protection equipment(Sound barrier),Assembled finished support and hanger,seismic support,Urban comprehensive pipe gallery support,channel design,Production,Sales,Install;Bridge expansion device sales,Install,maintain,Serve.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Cascade Engineering, Inc. engages in the provision of engineered plastics systems and components. It offers services to the renewable energy, automotive, commercial truck and bus, solid waste and recycling, material compounding, furniture, radio frequency identification (RFID) and material handling industry. It provides manufacturing, product development. innovation, and cascade enterprise system. The company was founded by Frederick P. Keller in 1973 and is headquartered in Grand Rapids, MI.

China Railway Siyuan Survey & Design Group Co., Ltd. is a company headquartered in China ultimately controlled by the Government of China. The firm provides engineering survey and design services.

Jiangsu Yuanxing Environmental Protection Group Co., Ltd., established on 2002-03-05, Business scope includes environmental protection equipment,noise control equipment,Water supply and drainage equipment,Garbage disposal equipment,HVAC equipment,FRP products,hydraulic metal structure,Mechanical and electrical complete sets of equipment,Sound Barrier Products,Geotextile,Geomembrane,e s,Electrified railway catenary pillars(Except for galvanizing process),Embedded channel(Except for galvanizing process),floating board,Shock absorbers and accessories,spring compensator,isolation fence,bridge guardrail,cable tray,Research on cable cover,design,to develop,manufacture,Sales,technical consulting,technology transfer,Technical Services,Construction of installation works;Design of Environmental Engineering;Metal cold working;Wholesale of building materials;Engaged in the general contracting business of municipal public works construction according to the second-level qualification;Self-operated and agent import and export business of various commodities and technologies(Except for commodities and technologies that the state restricts enterprises to operate or prohibits import and export).(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Sentexing Group Co., Ltd., established on 2001-12-05, Business scope includes production,Research and development of special equipment for environmental protection;Production of metal composite curtain wall panels,Al-Mg-Mn alloy plate,Composite sound insulation and absorption barrier board;Steel structure engineering professional contracting;Foreign contracted projects;Engineering survey and design;Manufacture of photovoltaic equipment and components;generate electricity,power transmission,Power supply business;Power facility installation,undertook,Take the test;Environmental noise control;water pollution control;Air Pollution Control;Solid waste pollution control;Soil Pollution Control and Restoration Services;Environmental monitoring;technology development,Technical Services,technology transfer,technical consulting,Technology Promotion,Technical testing;Sales of high-end architectural metal roofing systems,High-end architectural metal wall system,Metal composite curtain wall system,Pressed color steel plate,Metal composite curtain wall system,Photovoltaic equipment and components,metal industrial door,Csteel,Thin-walled steel,Environmental sound-absorbing building materials,New roof ventilation and daylighting system,new metal building materials,Profiled steel plate and its supporting equipment,Various curtain walls,doors and windows,Equipment;Steel structure engineering design;Steel structural components and supporting installation and service;Investment and Asset Management;Technology Import and Export,Import and export,Agent import and export;Warehousing Services;Equipment Leasing;software development;Information Technology Services.(Market entities independently choose business projects in accordance with the law,Carry out business activities;Items subject to approval by law,Carry out business activities in accordance with the approved content after approval by relevant departments;Do not engage in the business activities of projects prohibited and restricted by the industrial policies of the state and this city.)

Chengdu Zhonghong Rail Transit Environmental Protection Industry Co., Ltd., established on 2012-07-30, Business scope includes licensed projects:Construction labor subcontracting;construction professional work;Construction Engineering Construction.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments,The specific business items are subject to the approval documents or licenses of relevant departments)General project:Manufacturing of thermal and acoustic insulation materials[Branch operation];Thermal and acoustic insulation sales;Vibration and noise reduction equipment sales;Manufacture of non-metallic mineral products[Branch operation];Sales of non-metallic minerals and products;Metal material manufacturing[Branch operation];Metal Products Sales;Sales of metal matrix composites and ceramic matrix composites;Rail Transit Special Equipment,Sales of key systems and components;Sales of special ceramic products;Sales of high-performance fibers and composite materials;New material technology research and development;New material technology promotion service;Carbon emissions,carbon conversion,carbon capture,Research and development of carbon sequestration technology;Resource recycling technology research and development;Resource recycling service technical consultation;Energy saving management service;Engineering and Technology Research and Experimental Development;Industrial Design Services;Mechanical equipment research and development;Engineering technical service(planning management,survey,design,Except supervision);Technical Services,technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion;Import and export.(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)

Tiangong Lide Technology Development Co., Ltd., established on 2009-06-10, The scope of business includes the manufacture of metal structures.metal sound barrier,non-metallic sound barrier,Fully enclosed sound barrier,semi-closed sound barrier,wind barrier,R & D and design of protective screen,manufacture,Sales,Install,technology development,Technical Services;prestressed steel rod,Unbonded prestressed steel rods,slow bonded prestressed steel rod,R&D and design of prestressed anchors and connectors,manufacture,Sales,Install,technology development,Technical Services;Environmental Engineering,Steel structure engineering,Municipal public works construction;Engineering Management Services,technical consulting,technology development,technology transfer,Technical Services;Manufacturing of waterproof engineering equipment;Noise and Vibration Control Services;Construction of underground comprehensive pipe gallery;Waterproof construction;Environmental Pollution Prevention and Control Equipment,Air Pollution Prevention and Control Equipment,noise control facility,muffler,sound absorption,Production of sound insulation equipment,sales and installation,technology development,Technical Services;bridge bearing,building support,Production of bridge telescoping devices,Sales,Installation and technical service;Track sound-absorbing panels,Ceramsite board(brick),Permeable sound-absorbing brick,polycarbonate sheet(pcplate),Acrylic sheet,Laminated glass,Polymer particle sound-absorbing panel,Prefabricated reinforced concrete components,Rubber and plastic polymer products,bridge detection(check)car,Ocean Engineering Equipment,Traffic Safety Engineering Facilities,isolation fence,bridge guardrail,protective net,Gabion,Mountain protection net,Metal structural parts,steel structure,Embedded parts,Embedded bolts,Anti-glare net,sign post,crash barrier,marking line,Sign,Production of anti-throwing nets and railway fasteners,sales and installation,technology development,Technical Services;waterproof material,Anti-corrosion material,Insulation Materials,coating,Waterstop,Geotextile,Plastic polymer products,e s,waterproof materials,Production of sealants,Sales,Installation and technical service;Door and window manufacturing and processing,Sales;Manufacture of photovoltaic equipment and components,Sales;lightweight building material,Manufacture of concrete structural members,Sales,Install;Manufacturing and processing of new energy equipment,Sales;Electric Iron Attachments,power metal structure,Production of catenary struts,Sales,Install;software design;Construction labor subcontracting;Import and export of goods or technology(Except for the import and export of goods and technologies that are prohibited by the state or involve administrative approval).(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Sichuan Shuangtie Technology Co., Ltd., established on 2015-02-16, Business scope includes general items:Engineering and Technology Research and Experimental Development;Industrial Engineering Design Services;Manufacture of concrete structural components;Sales of concrete structural components;Eco-environmental material manufacturing;Synthetic Materials Sales;Wholesale of hardware products;brick and tile sales;Non-residential real estate leases;New material technology research and development;Sales of new ceramic materials;Intelligent basic manufacturing equipment manufacturing;Vibration and noise reduction equipment sales;Manufacture of vibration and noise reduction equipment;Resource recycling technology research and development;Sales of green composite materials for rail transit.(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)

China Railway Research Institute Group Co., Ltd., established on 2002-01-24, Business scope includes rail transport,Related technology and equipment of urban rail transit,System Integration Research,to develop,Production,Sales;contractor,Survey and design,construction,supervision;Material and process,Development of environmental protection technology and its equipment,application;development of computer technology,application;technology development,technology transfer,Technical Services,technical consulting,Technical testing;Environmental Impact Assessment;Import and export business;Technology and product exhibition;advertising business;property management;car park service;lease commercial premises;road freight transport;Risk Assessment of Geological Hazard Prevention and Control.(Market entities independently choose business projects in accordance with the law,Carry out business activities;Road freight transport and items subject to approval by law,Carry out business activities in accordance with the approved content after approval by relevant departments;Do not engage in the business activities of projects prohibited and restricted by the industrial policies of the state and this city.)

Sichuan Yunlu Technology Co., Ltd., established on 2014-07-22, Business scope includes(The following scope does not include pre-licensed items,Post-licensing projects operate on the basis of licenses or approval documents)Software and information technology service industry;Mechanical and Electrical Engineering;Construction mechanical and electrical installation engineering;Highway Traffic Engineering;Environmental Engineering;bridge engineering;Steel structure engineering;New material technology promotion service;Energy-saving technology promotion service;Manufacture of special equipment for environmental protection(Choose another site or restrict branches to operate in the industrial park);Electrical machinery and equipment manufacturing(Choose another site or restrict branches to operate in the industrial park);engineering design;Commodity wholesale and retail;sound barrier,Kitchenware,R&D and manufacturing of kitchen equipment(Choose another site or restrict branches to operate in the industrial park);Construction labor subcontracting(Operating with a qualification certificate).(Engineering class operates with qualification certificate);HR Services(Did not obtain the relevant administrative license(approval),Do not carry out business activities);Fabrication of Metal Structures(Restrict branches to operate in industrial parks);Mechanical parts processing(Restrict branches to operate in industrial parks);packaging service;Undertake,undertook,Test power supply facilities and power receiving facilities(Did not obtain the relevant administrative license(approval),Do not carry out business activities);Decoration and handling;Manufacture of power distribution switch control equipment(Restrict branches to operate in industrial parks);Earthwork,Water Resources and Hydropower Engineering,Design and Construction of Architectural Decoration Engineering(Operating with a qualification certificate).(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).

China Railway Sixth Group Co. Ltd. (doing business as The Sixth Engineering Burecrec) is a private company headquartered in Haidian, China, that provides transportation services.

Shangfeng Technology Co., Ltd., established on 1998-08-25, Business scope includes manufacturing of special equipment for environmental protection;Environmental protection high-tech research and development,introduce;Air Pollution Control;Noise Pollution Control;Solid Waste Treatment;Soil Pollution Control and Restoration;Light Pollution Control;Radiation Pollution Control;Geological disaster management;water pollution treatment;Environmental and ecological monitoring and testing services;Operation of Environmental Pollution Control Facilities;internet of things,Cloud Computing Technology Development,Sales and Service;Information system integration;Research and development of computer hardware and software,Sales and Service;Internet data processing and storage services;Smart city technology development,product design,Production,Sales;air disinfection,Purification technology development,product design,Production,Sales;cultural activity mobile service:plan,organize;Cultural Product Design,Production,Sales;Assembly of high and low voltage electrical equipment,processing;construction project,Building Construction:Construction General Contracting,Environmental engineering construction,Steel structure engineering,foundation engineering;Environmental Engineering Design,Lightweight steel structure design;Quality inspection of construction projects;Wind power and noise control technology;wind barrier,Wind and dust suppression net,Fully enclosed coal bunker,Production and processing of sound barriers,Production and processing of railway sound barriers and important components,Electrified railway catenary pillars;Soundproof wall,Ventilation and muffler,Air-cooled platform energy dissipation guide device,Negative pressure isolation chamber,Comprehensive corridor,Track damping products,Track sound-absorbing panels,Research and development of flood control products,Production,Sales;import and export:trade export;Own house rental.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Hebei Jinbiao Building Materials Technology Co., Ltd. is one of the earliest professional manufacturers of traffic safety materials in China; The company covers an area of 200 mu, has more than 400 employees, with a registered capital of 60.4 million yuan and a working capital of 20 million yuan. The company held the listing ceremony in Shijiazhuang Equity Exchange on December 26, 2014, and the company has registered the trademark of Golden Label Net Bar and Sanhong Aluminum Template for Sound Barrier. The company has Hebei Yibiao Traffic Safety Facilities Co., Ltd., Anping Fenghe Jiao'an Facilities Co., Ltd. and Hebei Sanhong Building Materials Technology Co., Ltd. The enterprise passed the ISO9001 － 2000 quality system certification as early as 2009, and has successively won the honors of "AAA Credit Enterprise", "Hebei Excellent Enterprise", "Enterprise Abiding by Contracts and Credits", and "Advanced Unit of Safety Production". For a long time, the company has established good cooperative relations with China Railway Corporation, China Construction Corporation, well-known traffic safety units, etc. The company's business scope: three production bases including expressway and railway sound barrier production bases; Production base of separation fence, protective fence and barbed wire; Design, R&D and production base of architectural aluminum formwork.

Jiangsu Yuanxing Group Construction Co., Ltd., established on 2008-10-27, Business scope includes municipal engineering,Environmental Engineering,Mechanical and Electrical Engineering,Steel structure engineering,building engineering,Road construction,Construction of railway installation works;Sound barrier,Noise reduction equipment,Soundproofing,Embedded channel(Except for galvanizing process),Electrified railway catenary pillars,floating board,spring compensator,Shock absorbers and accessories,cable tray,cable cover,isolation fence,bridge guardrail,Water Pollution Prevention and Control Equipment,Water supply and drainage equipment,hydraulic metal structure,Mechanical and electrical complete sets of equipment,HVAC equipment,Air Pollution Prevention and Control Equipment,Solid waste treatment and disposal equipment,Research on the Complete Set of Automatic Control Device,design,to develop,manufacture,Sales,Install,technical consulting,technology transfer,Technical Services;Self-operated and agent import and export business of various commodities and technologies(Except for commodities and technologies that the state restricts enterprises to operate or prohibits import and export).(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)