PetroChina Co. Ltd. engages in the petroleum related products, services and activities. It operates through the following business segments: Exploration and Production; Refining and Chemicals; Marketing; Natural Gas and Pipeline; and Head Office and Other. The Exploration and Production segment involves exploration, development, production, and marketing of crude oil and natural gas. The Refining and Chemicals segment focuses on the refining of crude oil and petroleum products, production and marketing of primary petrochemical products, derivative petrochemical products, and other chemical products. The Marketing segment includes marketing of refined products and the trading business. The Natural Gas and Pipeline segment comprises transmission of natural gas, crude oil, and refined products and the sale of natural gas. The Head Office and Other segment relates to cash management and financing activities, the corporate center, research and development, and other business services supporting the operating business segments of the Group. The company was founded on November 5, 1999 and is headquartered in Beijing, China.

China Railway Urban Construction Group Co., Ltd. is a company headquartered in China ultimately controlled by the Government of China that provides civil contracting services.

China Oilfield Services Ltd. is an investment holding company, which engages in the provision of offshore oilfield services. It operates through the following segments: Drilling Services, Well Services, Marine Support Services, and Geophysical Acquisition and Surveying Services. The Drilling Services segment provides oilfield drilling services. The Well Services segment includes the logging and downhole services, such as drilling fluids, directional drilling, cementing and well completion, and the sale of well chemical materials and well workovers. The Marine Support Services segment is composed of the transportation of materials, supplies and personnel to offshore facilities, moving and positioning drilling structures, the transportation of crude oil and refined products. The Geophysical and Surveying Services segment deals with offshore seismic data collection, marine surveying, and data processing services. The company was founded on February 15, 1982 and is headquartered in Langfang, China.

Guizhou Water Conservancy and Hydropower Survey, Design and Research Institute Co., Ltd., established on 1995-04-26, Business scope includes legal,regulations,Those prohibited by the State Council's decision shall not operate;law,regulations,The State Council has decided to allow(approval)of,After approval by the examination and approval authority(approval)file management;law,regulations,The State Council has decided that a license is not required(approval)of,Market entities independently choose to operate.(licensed items:Construction engineering design;Mapping service;Construction Engineering Survey;Geological disaster control engineering survey;Geological disaster control engineering design;Geological Hazard Risk Assessment;Water Conservancy Engineering Quality Inspection;Quality inspection of construction projects(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)General project:Water Conservancy Related Consulting Services;Engineering Management Services;Environmental Consulting Services;Soil Erosion Prevention and Control Services;water resource management;Hydrological Services;rental service(Licensed rental services not included);Non-residential real estate leases;Information system integration service;software development;Retailing of computer software, hardware and auxiliary equipment;HR Services(Excludes job brokerage activities,Labor dispatch service);Import and export(Except for licensed business,Can independently operate projects that are not prohibited or restricted by laws and regulations))

Powerchina Huadong Engineering Corp. Ltd., a subsidiary of Power Construction Corporation of China, Ltd., is a company headquartered in Hangzhou, China, that provides industrial engineering services.

Nanjing Kexing New Material Technology Co., Ltd., established on 2017-01-10, Business scope includes research and development of new materials,technical consulting,Technical Services;decoration works,construction work,Municipal Engineering,Scaffolding works,Landscaping project,Intelligent Building Engineering Design,construction;building materials,decorative material,steel,metallic material,ceramics,Anti-corrosion insulation material,Fire equipment,Wire and Cable,D,Labor protection supplies,Daily necessities,Office Supplies,Plumbing equipment,lighting device,Chemical product sales.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Powerchina Chengdu Engineering Corp., Ltd. provides planning and consultancy, investigation and design, engineering and construction, as well as investment and financing services in clean energy, water, infrastructure, and other fields. The company was founded in 1950 and is headquartered in Chengdu, China.

CCCC Fourth Harbor Engineering Co., Ltd. is a Chinese company located in Guangzhou and ultimately controlled by the Government of China. The firm constructs ports, bridges, railways and expressways.

Powerchina Guiyang Engineering Corp. Ltd. is a Chinese company located in Guiyang and ultimately controlled by the Government of China that provides hydraulic engineering services.

Beijing Jianancheng Geotechnical Engineering Co., Ltd., established on 2008-03-17, Business scope includes various engineering construction activities;Building Intelligent Engineering Construction;General contracting of housing construction and municipal infrastructure projects;Construction labor subcontracting(The qualification certificate of the construction industry enterprise is valid until2021year12moon31day);Engineering survey and design;road freight transport;Labor service(no intermediary);Engineering Consulting;Sales of wind turbines and related parts and related equipment,Electrical Equipment,building materials;Construction waste removal;fan base,Technical Development of Wind Tower,design;wind power,Solar equipment and structural products,Technical development of electromechanical products,technical consulting;device installation,lease.(Market entities independently choose business projects in accordance with the law,Carry out business activities;road freight transport,Engineering survey and design,Various construction activities;Building Intelligent Engineering Construction;General contracting of housing construction and municipal infrastructure projects;Construction labor subcontracting;and items that are legally subject to approval,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.)

Beijing GeoEnviron Engineering & Technology, Inc. engages in the environmental technology research and provision of systematic solution for pollution prevention and treatment. The company offers management system mainly composed of industrial environmental services, urban environmental services, and environmental remediation. It also involves in pollution prevention and treatment technologies of solid waste management and liquid waste management and other related services. The company was founded on August 28, 1992 and is headquartered in Beijing, China.

Zhejiang Zheneng Huaguangtan Hydropower Co., Ltd., established on 2002-01-31, Business scope includes hydropower development,Production,Sales;Serve:stay,Chinese food(With cold dishes)(Limited to branch operations).(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

CCCC Second Harbor Engineering Bureau Co. Ltd. is a Chinese company located in Wuhan and ultimately controlled by the Government of China. The firm provides civil engineering and municipal construction services.

Zhejiang Yuansuan Technology Co., Ltd., established on 2017-04-07, Business scope includes licensed projects:The first type of value-added telecommunications services(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments,Specific business projects are subject to approval results).General project:Technical Services,technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion;Wholesale of computer software, hardware and auxiliary equipment(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license).

China Huadian Technology Group Co., Ltd., established on 1992-03-17, Business scope includes licensed projects:Power generation business,Transmission business,for(match)Electric business;Construction Engineering Construction;Building Intelligent System Design;Construction Project Supervision;Construction engineering design.(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:Technical Services,technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion;Engage in investment activities with own funds;Engineering Management Services;Contract Energy Management;Manufacturing of special equipment(Manufacture of licensed professional equipment not included);General equipment manufacturing(Does not include special equipment manufacturing);Sales of power facilities and equipment;Machinery sales;electronics sales;Sales of building materials;Sales of Advanced Power Electronics Devices;Electrical Equipment Sales;Chemical product sales(No licensed chemical products);property management;Non-residential real estate leases;Import and export;Technology Import and Export;Import and export agency;Foreign contracted projects.(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)(Do not engage in the business activities of projects prohibited and restricted by the industrial policies of the state and this city.)

Sinosteel Maanshan General Inst of Mining Research Co., Ltd. provides mineral resource comprehensive utilization services. It offers mining, mineral processing, geotechnical, mine safety, environmental protection, and related technical and technical engineering services. The company was founded in 1963 and is headquartered in Maanshan, China.

HYDROLANCANG is a Chinese hydro powerplant operator that generates electricity for various sectors. the real estate, tourism, transportation, biotechnology, hotels, building materials, and mechanical equipment business sector. The company was founded in 2001 and is based in Kunming, China.

Yanchang Oil Field Co., Ltd., a subsidiary of Province of Shaanxi, is a company headquartered in China. The firm provides oil and gas services.

China Coal Third Construction (Group) Co., Ltd. No. 36 Engineering Office, established on 2012-04-26, Business scope includes civil construction,Mining,tunnel,Earthwork construction;Manufacture of machinery and equipment,Install,repair,Non-standard parts processing,Real estate and equipment leasing,building materials,steel,mechanical,equipment,Accessories,electric wire,cable,electrical sales,coal mining,Mining,Engineering Management Consulting,waste material recycling,Processing and sales(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).