CNOOC Energy Technology & Services Limited (Stock Code: 601808.SH) is a state-controlled listed company under the China National Offshore Oil Corporation (CNOOC) Group Co., Ltd. The Company positions itself as a full-lifecycle service provider for the energy industry, focusing on three major business segments: offshore oil and gas development services; low-carbon environmental protection and digitalization; and new energy and new materials. Its core businesses encompass oilfield technical services, equipment manufacturing, LNG terminal construction and operations, FPSO operation and management, offshore wind power engineering services, energy-saving and carbon-reduction technology integration, intelligent oilfield solutions, and research, development, and production of chemical new materials. Its service scope covers critical areas including deepwater drilling and production, floating production, cold energy utilization, digital and intelligent oilfield management, offshore wind power operation and maintenance, and CO₂ capture, utilization, and storage (CCUS). Relying on its nationally accredited enterprise technology center, CNAS-accredited laboratories, provincial- and ministerial-level engineering technology research centers, and postdoctoral scientific research workstation, the Company has secured over 2,700 authorized patents to date, approximately 45% of which are invention patents. It has established technological barriers in fields such as intelligent control of deepwater equipment, life-extension retrofits of FPSOs, cascaded utilization of LNG cold energy, integrated installation processes for offshore wind power, and CCUS. The Company has obtained certifications for ISO 9001, 14001, 45001, and 50001 management systems; holds A1/A2-grade pressure vessel design and manufacturing licenses; possesses Class I professional contracting qualification for offshore petroleum engineering; holds special equipment inspection and testing approval certificates; holds civilian nuclear safety equipment manufacturing licenses; and maintains national confidentiality qualifications. It also complies with API and IMO international standards. Representative projects include domestication of supporting equipment for the “CNOOC 981” drilling rig; comprehensive utilization of cold energy at the Zhuhai Jinhai LNG terminal; full-lifecycle digital and intelligent management of the Kenli 6-1 oilfield; EPC services for the Albert Lake FPSO project in Uganda; and construction of China’s first intelligent offshore wind power O&M platform. The Company has led the formulation of 12 industry standards. Its operations span all China’s offshore waters and extend to over ten countries and regions, including Southeast Asia, the Middle East, and Africa. It provides multi-dimensional cooperation to energy enterprises, local governments, and international clients—including R&D, engineering EPC, equipment development, digital platform construction, green and low-carbon solutions, and Belt and Road energy cooperation.

Wuhan Zhihong Pharmaceutical & Chemical Environmental Protection Technology Co., Ltd. is a high-tech enterprise specializing in environmental governance and resource utilization within the pharmaceutical and chemical industry, dedicated to providing integrated “three-waste” (wastewater, waste gas, and solid waste) treatment solutions for active pharmaceutical ingredient (API) manufacturers and chemical synthesis drug producers. The company’s core business covers specialized applications including pretreatment and advanced reuse of high-concentration, refractory pharmaceutical wastewater; catalytic oxidation of nitrogen- and phosphorus-containing waste gases; and fractional distillation recovery of waste solvents. It has developed a proprietary wastewater treatment process package centered on “micro-electrolysis–Fenton coupled oxidation + MBR (membrane bioreactor) biochemical enhancement,” which has been successfully engineered and implemented. Leveraging independent R&D capabilities, the company holds two invention patents (covering a multi-stage ozone catalytic oxidation reactor and modified zeolite adsorbent material for ammonia-nitrogen removal) and seven utility model patents, with all technological achievements deployed in actual projects. The company holds a Discharge Permit (valid until 2029), a Construction Enterprise Qualification Certificate (Grade III specialty contracting qualification for environmental engineering), and is certified under the ISO 9001 Quality Management System. Representative projects include: the upgrading and reconstruction of the wastewater treatment plant for a cephalosporin API production line at a listed pharmaceutical enterprise in Hubei Province (commissioned in 2022, achieving ≥92% COD removal efficiency and stable effluent compliance with GB 21904–2008); and the construction of an integrated VOCs adsorption–desorption–catalytic combustion system for a chemical synthesis pharmaceutical enterprise in Jiangxi Province (completed and accepted in 2023). Its services cover central China’s pharmaceutical industry clusters—including Hubei, Hunan, and Jiangxi provinces—and it offers pharmaceutical and chemical enterprises comprehensive environmental technology development and consulting, pollution control engineering design and construction, environmental equipment R&D, sales, and installation, as well as customized integrated “three-waste” treatment services.

Panjin Liaohe Oil Field Dali Group Co., Ltd. is an energy service enterprise developed based on the regional resources and industrial foundation of the Liaohe Oilfield. It positions itself as a regional, specialized, technology-application-oriented provider of oilfield equipment and technical services, with its core business focused on meeting the requirements for stabilizing and enhancing production efficiency at the Liaohe Oilfield and surrounding mature oilfields. The company’s primary business activities encompass sales of petroleum and natural gas equipment and related technical services, research and manufacturing of oilfield-specific tools, production of drilling and production components, installation engineering of electromechanical equipment, corrosion protection and thermal insulation engineering, and environmental protection technical services—covering typical application scenarios such as maintenance and repair of wellhead equipment, energy-saving retrofitting of beam pumping units, mass supply of casing centralizers, and on-site technical services. The company possesses robust capabilities in implementing technologies and has obtained six authorized utility model patents, all concentrated on improving ground-level oilfield equipment and enhancing operational reliability—for instance, corrosion-resistant bimetallic composite casing couplings and intelligent temperature-control protective devices for beam pumping unit motors. In terms of qualifications, the company holds Grade III General Contracting Qualification for Petrochemical Engineering Construction, a Work Safety Production License (Liao An Xu Zheng Zi [2021] No. 08-0076), and ISO 9001:2015 Quality Management System Certification (Certificate No.: 00122Q3123456R3M), valid until August 2025. As a key non-core equipment supplier within the Liaohe Oilfield region, the company has long provided stable equipment supply and technical services to entities such as the Liaohe Oilfield Branch Company and Great Wall Drilling Engineering Company; its supplier registration information is consistent with the Liaohe Oilfield Supply Chain Management System. Cooperation modes are flexible, supporting various models including equipment supply, customized R&D, on-site technical support, engineering implementation, and operation & maintenance services—applicable to specific business scenarios such as upgrading and reconstruction of oilfield surface systems, energy-saving and consumption-reduction projects, and adaptive optimization of aging facilities.

Dalian Xin’an Energy Co., Ltd. is registered in Ganjingzi District, Dalian City, Liaoning Province. It is a national high-tech enterprise specializing in distributed energy system integration, integrated energy services, and application of novel energy storage technologies. Its industry classification is “Electric Power, Heat Production and Supply” (D4410). Since 2019, the company has entered a phase of scaled development and has completed delivery of 27 commercial and industrial energy storage projects across Liaoning, Hebei, and Shandong provinces, with a total installed capacity reaching 136.8 MWh. The company’s core business focuses on energy optimization scenarios for chemical industrial parks and large-scale industrial enterprises on the user side. Specific offerings include investment, construction, and operation of commercial and industrial user-side energy storage power stations; design and EPC general contracting of photovoltaic-storage-charging integrated microgrid systems; development of Energy Management Systems (EMS); and intelligent energy托管 services. Typical clients include process industries with high energy consumption and high flexibility requirements for load adjustment—such as petrochemicals, coal chemical processing, and fine chemical manufacturing. Its core technical capabilities encompass: high-precision joint estimation algorithms for lithium battery State-of-Charge (SOC) and State-of-Health (SOH); plug-and-play communication protocol adaptation modules for heterogeneous multi-source energy equipment; and an edge-side lightweight EMS platform. The company holds six authorized invention patents, 19 utility model patents, and 14 software copyrights. It has passed third-party testing by China Electric Power Research Institute (CEPRI) (Test Report No.: CEPRI-TEST-2024-EN0883). The company holds the following qualifications: Grade III General Contracting Qualification for Electric Power Engineering Construction; License for Installation (Maintenance/Testing) of Electric Power Facilities (Grade IV for Installation, Grade IV for Testing); and ISO 9001/14001/45001 integrated management system certifications. It has established the Liaoning Provincial Enterprise Technology Center (certified under Document No. Liao Xin Gong Fa [2022] 187 issued by the Liaoning Provincial Department of Industry and Information Technology). Representative projects include: (1) the comprehensive energy retrofit project for Dalian Ice Mountain Group in 2023—featuring combined cooling, heating, and power (CCHP) plus energy storage—with a total investment of RMB 120 million and annual peak-shaving and valley-filling electricity volume of 18.6 GWh; and (2) the 12 MW / 24 MWh user-side energy storage peak-shaving project at Hengli Petrochemical Park, selected in 2024 for the demonstration project list issued by the Liaoning Provincial Energy Administration. Public records indicate no foreign direct investment, international engineering contracting experience, or overseas subsidiaries. Its current business operations are confined to China’s Bohai Rim Economic Circle. Cooperative models include EPC general contracting, technology licensing plus engineering implementation, customized development of intelligent energy platforms, and full-lifecycle operation & maintenance (O&M) outsourcing.

Dalian Bihai Environmental Protection Equipment Co., Ltd., located in Yingchengzi Industrial Park, Ganjingzi District, Dalian City, Liaoning Province, is a national high-tech enterprise specializing in the research, development, and manufacturing of industrial wastewater treatment systems, reclaimed water reuse solutions, and integrated environmental protection equipment. The company is in the mature industrialization phase and has completed its transformation from supplying individual equipment to providing end-to-end services covering process design, core equipment integration, and intelligent operation & maintenance. Its core business serves heavily polluting industries—including electroplating, printed circuit board (PCB) manufacturing, and surface treatment—by addressing highly challenging wastewater streams containing heavy metals and high-concentration organic pollutants. It delivers customized solutions based on an integrated technological pathway comprising electrochemical advanced oxidation, gradient membrane separation, and AI-enabled energy efficiency optimization. The company possesses independent R&D and engineering delivery capabilities, operates a CNAS-accredited laboratory (Registration No. L9265), and holds 47 authorized patents (including 12 invention patents). Its core technologies feature modularized equipment design, independently developed control algorithms, and cloud-based operational data management. The company is capable of undertaking EPC general contracting for industrial wastewater treatment plants with daily capacities ranging from 3,000 to 5,000 tons. Its flagship BH-EC series of electrochemical wastewater treatment equipment has received Class A certification from the China Environmental Protection Industry Association and has been included in the “Catalogue of Major Environmental Protection Technologies and Equipment Encouraged by the State (2023 Edition).” The company holds ISO 9001/14001/45001 integrated management system certifications, the “Special Equipment Production License of the People’s Republic of China” (Pressure Pipeline Components, Grade A), and the “Qualification Certificate for Operation of Environmental Pollution Control Facilities” (Grade A for Industrial Wastewater; Certificate No.: Huan Yun Ying Liao Zi 2021-037). Representative projects include: (1) constructing and commissioning, for a Shenzhen-based listed PCB manufacturer, a zero-discharge system treating 3,000 tons/day of copper/nickel-containing wastewater, operating stably for over four years with a water reuse rate of 92%; and (2) designing and building, for the Suzhou Industrial Park Electroplating Agglomeration Zone, a centralized pre-treatment center for electroplating wastewater with a capacity of 5,000 tons/day (EPC general contracting), where heavy metal discharge levels consistently meet standards stricter than those stipulated in Table 3 of GB 21900–2008. The company participates in international projects via equipment exports and technical services, including delivering cyanide-containing wastewater cyanide destruction modules to the Bac Giang Electronics Industrial Park in Vietnam (2024) and completing remote diagnostics and control system upgrades for an automotive parts factory in Monterrey, Mexico (2025). Cross-border project delivery is supported by 11 provincial after-sales service centers across China and a technical collaboration mechanism with Germany’s EnviroTech GmbH.