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Xiamen Aidi Environmental Protection Technology Co., Ltd. is a high-tech enterprise specializing in the research, development, and application of industrial wastewater treatment and resource recovery technologies. It operates within the “water pollution control” subsector of the “ecological conservation and environmental governance” industry. The company’s core business covers advanced wastewater treatment, heavy metal recovery, reclaimed water reuse, and zero-liquid-discharge (ZLD) system integration for heavily polluting industries—including electroplating, printed circuit board (PCB) manufacturing, printed wiring board production, and surface treatment—providing integrated, one-stop solutions to industrial parks and individual factories, spanning process design, system integration, and intelligent operational management. Its core technologies focus on multi-stage membrane coupling processes, regenerable selective ion-exchange resins, and intelligent chemical dosing control systems. The company holds five invention patents and twelve utility model patents; among them, achievements such as “A Selective Separation and Recovery Method for Copper- and Nickel-Containing Wastewater” (Patent No.: ZL202010123456.7) have been successfully implemented in engineering applications. The company possesses third-party environmental pollution control service capabilities recognized by the Ministry of Ecology and Environment of China and holds the “Environmental Pollution Control Facility Operation Qualification Certificate” (Grade-A for Water Pollution Control; Certificate No.: Huan Yun Ying Zheng Zi [2021] A-0086; valid until December 2026), and has obtained ISO 9001 Quality Management System and ISO 14001 Environmental Management System certifications. Its technological achievements have been deployed in over 20 electroplating parks and individual factory projects across Xiamen, Zhangzhou, and Quanzhou. A representative case is the nickel-containing wastewater resource recovery project at a national-level electronics industrial park in Xiamen, achieving a nickel recovery rate >92% and reclaimed water reuse rate >85%. Currently, its service area is concentrated in Fujian Province, and its collaboration models include technology licensing, EPC (Engineering, Procurement, and Construction) general contracting, entrusted operation, and customized ZLD system development.

Sanmenxia Huanyu Biochemical Technology Co., Ltd. is a medium- and small-sized biotechnology enterprise based in western Henan Province, dedicated to promoting green agricultural development in the region. The company specializes in the industrial application of microbial preparations and bio-organic fertilizers. Its core business covers research, development, production, and sales of biological enzyme preparations, microbial fermentation products, feed additives (e.g., probiotic preparations such as Bacillus subtilis and Bacillus licheniformis), organic fertilizers, and bio-organic fertilizers; it also extends into technology development related to resource utilization of agricultural waste. Leveraging its self-developed utility model patented technologies—including temperature-controlled mixing tanks, composite bacterial powder drying equipment, and odor collection and treatment systems for organic fertilizer—the company possesses robust engineering capabilities in optimizing microbial fermentation processes, enhancing product stability, and controlling environmental conditions during composting. The company holds the “Feed Additive Production License” (No. Yu Shi Tian (2020) T038), issued by the Department of Agriculture and Rural Affairs, and the “Fertilizer Registration Certificate” (No. Yu Nong Fei (2021) Approval No. 2217), and has obtained ISO 9001:2015 Quality Management System Certification, ensuring regulatory compliance and controllability of production. In practice, the company has deeply participated in the “Technical Service Demonstration Project for Livestock and Poultry Manure Resource Utilization” in Shanxian District, providing customized microbial deodorization and compost inoculation services, along with corresponding technical guidance, to five large-scale livestock farms in the locality. Its “Huanyu Fengwo” brand bio-organic fertilizer has undergone field trials in apple-growing areas of western Henan, validating its effectiveness in improving soil organic matter content and suppressing root rot disease. Currently, the company’s business covers Henan Province and neighboring major agricultural production areas, including Yuncheng City in Shanxi Province and Weinan City in Shaanxi Province. Its primary customers include large-scale livestock farming entities, organic/green crop production bases, circular agriculture pilot units, and grassroots agricultural technology extension institutions. The company offers diverse collaborative support models, including product supply, customized technical solutions, on-site technical services, and joint experimental cooperation.

Qinghai Yihua Chemical Co., Ltd. is a basic raw materials producer specializing in chlor-alkali chemical manufacturing, controlled by Hubei Yihua Group. The company focuses on an integrated industrial chain covering chlor-alkali production, acetylene generation, and polyvinyl chloride (PVC) manufacturing. Its core business encompasses research, production, and sales of calcium carbide, caustic soda, liquid chlorine, hydrochloric acid, PVC resin, as well as supporting processes such as limestone calcination and acetylene generation. Its products are widely applied in construction materials, agricultural films, medical device packaging, and chemical intermediates. The company possesses core technical capabilities including energy-saving and consumption-reduction technologies for calcium carbide furnaces, automatic control systems for acetylene generators, and resource-recovery treatment technologies for mercury-containing waste acid. It holds seven utility model patents; its low-mercury catalyst application technology has passed technical appraisal by the China Chlor-Alkali Industry Association; and it participated in formulating the group standard “Evaluation Requirements for Green Factories in the Calcium Carbide Industry.” The company has been included consecutively for three years (2021–2023) in Qinghai Province’s provincial green manufacturing demonstration list. It maintains complete qualifications, holding the National Pollutant Discharge Permit (No.: 91632222770084558K001V), the Hazardous Chemicals Production Safety Permit (Qing An Jian Wei Hua Sheng Xu Zi [2023] No. 003), and the Ministry of Industry and Information Technology’s official announcement confirming compliance with the Chlor-Alkali Industry Regulatory Conditions. It has also obtained certification for the three major management systems: ISO 9001, ISO 14001, and ISO 45001. Representative projects include the 300,000-ton-per-year PVC energy-saving technological upgrading project and the calcium carbide furnace gas purification and hydrogen recovery & utilization system, achieving a 12.6% reduction in comprehensive energy consumption per ton of PVC. Domestically, its sales cover the five northwestern provinces as well as Sichuan and Henan provinces; some PVC products serve Central Asian markets via the Lanzhou New Area Comprehensive Bonded Zone under the “domestic sale converted to export” model. We sincerely invite practical cooperation and joint implementation in areas including energy-saving technological upgrades, solid waste resource utilization, green factory construction, regional supply chain collaboration, and upstream-downstream cooperation across the chlor-alkali industrial chain.

Qinghai Qinghua Coal Chemical Co.,Ltd. is a large-scale coal chemical enterprise under Qinghai Qinghua Group Co., Ltd., with core operations centered on clean and efficient coal utilization, specializing in coking and resource-oriented extended industries. The company’s primary business covers the production and sales of coal chemical products—including coke, coke oven gas, coal tar, and crude benzene—as well as washing and processing of coking coal, waste heat and waste pressure power generation, and high-value-added resource utilization such as producing LNG and hydrogen from coke oven gas. Leveraging its 7.63-meter top-charging large捣固 coke ovens, two 50 MW high-temperature, high-pressure dry quenching coke waste heat power generation units, and a 120 million cubic meters/year coke oven gas-to-LNG facility (commissioned in 2022), the enterprise possesses an annual coke production capacity of 3 million tons and large-scale comprehensive utilization capability for coke oven gas, achieving a comprehensive utilization rate of coke oven gas exceeding 98%. The company holds the “Work Safety Production License,” “Pollutant Discharge Permit,” and “National Industrial Product Production License (Coke),” and has passed certifications for the ISO 9001, ISO 14001, and ISO 45001 management systems. Supporting facilities include dry quenching coke systems, flue gas desulfurization and denitrification systems, VOCs treatment systems, and advanced wastewater treatment and reuse systems; it is designated by Qinghai Province as a key atmospheric pollutant discharger. In terms of technological expertise, the company holds four authorized invention patents and 27 utility model patents, focusing on energy conservation and consumption reduction, coke oven gas purification, and resource-oriented utilization. Representative projects include the integrated SDA semi-dry flue gas desulfurization + SCR denitrification retrofit project for coke oven flue gas—listed in the “Qinghai Province Green Manufacturing Demonstration List”—and Qinghai Province’s first pilot application project for hydrogen production from coke oven gas: the Qaidam Basin coke oven by-product hydrogen purification and hydrogen supply demonstration project for hydrogen refueling stations. Its products primarily serve major Northwest steel enterprises such as Jiuquan Iron and Steel Group and Xining Special Steel Group, while also fulfilling Qinghai Province’s energy supply security responsibilities; LNG is fed into Qinghai’s natural gas pipeline network, and hydrogen is already being supplied in small batches to fuel cell bus demonstration routes in Haixi Prefecture. Collaboration opportunities encompass coordinated coking capacity development, resource-oriented utilization of coke oven gas (e.g., LNG, hydrogen), investment and operation of waste heat power generation, environmental protection technology upgrade projects, and deep processing of coking by-products.

Qingdao Ecos Technology Engineering Co., Ltd. Jilin Branch Jilin Branch is a branch established by Qingdao Yikesi Technology & Engineering Co., Ltd. in Jilin Province. Relying on the parent company’s qualifications as a National High-Tech Enterprise and a Science & Technology-Based Small Enterprise, the branch specializes in chemical technology development, engineering design, and specialized technical services, with a strategic focus on green chemical technologies—including low-carbon olefin production, comprehensive utilization of light hydrocarbons, and energy-saving and carbon-reduction process optimization. The company’s core business encompasses chemical technology development, technology transfer, technical consultation, and technical services, as well as licensed services such as chemical engineering design, environmental protection engineering design, pressure piping (GC category) design, and pressure vessel (Class A1/A2) design. The parent company holds Class-A specialized design qualifications for the chemical, petrochemical, and pharmaceutical industry (chemical engineering) (Certificate No.: A137001272), Grade-B engineering consulting credentials (chemical sector), and ISO 9001 quality management system certification. It also owns over ten relevant invention patents and utility model patents, including “Catalyst for Propane Dehydrogenation to Propylene and Preparation Method Thereof” and “High-Efficiency Energy-Saving Heat Recovery System for MTO Reaction.” Representative projects include specialized process package development and engineering design for large-scale integrated refining & petrochemical projects undertaken by Sinochem Quanzhou, Hengli Petrochemical (Dalian), Zhejiang Petrochemical, and Wanhua Chemical; the branch has also participated in safety risk assessments and process compliance diagnostics for chemical industrial parks within Jilin Province. All external business activities of the branch are conducted under the parent company’s qualifications and brand, serving clients nationwide—with particular emphasis on supporting the industrial upgrading and green transformation of the chemical industry in Northeast China. The branch offers end-to-end collaborative solutions covering technology R&D, process package design, selection of key equipment, and engineering implementation support.

Qingdao Kaineng Environmental Protection Technology Co., Ltd. (Securities Abbreviation: Kaineng Technology; Securities Code: 837949) is a high-tech enterprise specializing in research, development, and industrial application of energy-saving and environmental protection technologies, positioned in the field of energy-saving technology equipment and services. The Company’s core businesses encompass waste heat and pressure utilization, industrial energy-saving system integration, flue gas treatment, solid waste resource recovery, and intelligent energy management, providing end-to-end energy-saving and carbon-reduction solutions for high-energy-consumption industries such as metallurgy, building materials, and chemical manufacturing. Leveraging 12 invention patents and 47 utility model patents, the Company has developed core technologies including “Multi-Source Waste Heat Cascaded Recovery Coupled Power Generation Technology” and “AI Algorithm-Based Dynamic Energy Efficiency Optimization System for Industrial Kilns.” These technologies have been successfully applied in representative projects such as the 120 MW sintering waste heat power generation EPC project for a steel group in Shandong Province, the preheater waste heat boiler energy-saving retrofit project for a cement enterprise in Inner Mongolia, and the deep waste heat recovery system for flue gas at a glass factory in Jiangsu Province. Its services cover over ten provinces, including Shandong, Hebei, Inner Mongolia, Jiangsu, and Henan. The Company holds Grade-B qualification for specialized design of environmental engineering (air pollution control engineering) and Grade-III qualification for professional contracting of architectural mechanical and electrical installation engineering. It is also certified under ISO 9001 Quality Management System, ISO 14001 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System. Currently, the Company offers diversified cooperation models—including energy-saving diagnostics, technical solution design, supply of core equipment, EPC project implementation, and construction of intelligent energy management platforms—to industrial enterprises, industrial parks, and engineering general contractors.

Qiyang County Yuexiang Industrial Gas Assembly Co., Ltd. is a regional hazardous chemicals trading enterprise specializing in the filling and distribution of industrial gases. It is registered and operates in the Qiyang Economic Development Zone, Hunan Province, serving Yongzhou City and surrounding manufacturing-intensive areas. The company’s core business includes the filling, storage, sale, and related services of compressed and liquefied gases such as oxygen, nitrogen, argon, carbon dioxide, acetylene, propane, and liquefied petroleum gas (LPG), providing stable and compliant industrial gas solutions to industries including metal processing, machinery manufacturing, food preservation, electronic welding, and chemical production. Leveraging its proprietary gas cylinder filling facilities and professional operation & maintenance team, the enterprise offers end-to-end services covering industrial gas equipment installation and repair, cylinder inspection and leasing, as well as related technical consulting support. In terms of qualifications, the company holds a valid “Hazardous Chemicals Trading License” (No. Xiang-Yong Wei-Hua Jing Zi [2023] 000125, valid until May 16, 2026) issued by the Hunan Provincial Department of Emergency Management, and a “Gas Cylinder Filling License” (No. TS4243B03-2025) approved by the Hunan Provincial Market Supervision Administration; the licensed media include permanent gases, liquefied gases, and dissolved acetylene, with special equipment filling qualifications remaining continuously valid. As a regional supply chain service provider, the company emphasizes safety compliance, timely responsiveness, and localized service delivery, and is capable of undertaking customized gas supply solutions, long-term gas supply agreements, cylinder托管 (cylinder management), and equipment maintenance & repair collaborations. Manufacturing enterprises, engineering project units, and industry integrators are welcome to initiate business coordination and collaborative service engagements.

Pulandian Zhongran Urban Gas Development Co., Ltd. is a regional urban gas supply enterprise affiliated with China Gas Holdings Limited (HKEX Stock Code: 00384.HK), specializing in natural gas transmission, distribution, and integrated services across the entire Pulandian District of Dalian City, Liaoning Province. The company’s core businesses include piped gas operations, installation and maintenance of gas facilities, sales and installation of gas appliances, engineering design and construction of gas facilities, and gas technical consulting services. Its customer base covers residential users (over 180,000 households), commercial and industrial users (more than 1,200 entities), and livelihood-oriented projects such as renovation of old residential communities. Leveraging China Gas’s standardized operational system, the company has comprehensively deployed NB-IoT Internet-of-Things gas meters and integrated them into the “China Gas Cloud” intelligent operations platform, enabling digital management capabilities including real-time gas consumption monitoring, intelligent leakage early warning, and remote valve control. It also implements the Group’s unified Health, Safety, and Environment (HSE) management system and customer service standards. The company holds a valid “Gas Operation Permit” (Permit No.: Liao 2023 Ran Jing Zheng 02010001J) issued by the Department of Housing and Urban-Rural Development of Liaoning Province, authorizing piped natural gas operations within the administrative boundaries of Pulandian District, with validity extending until June 2028. As of the end of 2024, the company had achieved full coverage of main urban distribution networks and continued extending networks into townships, having laid over 420 kilometers of medium- and low-pressure pipelines and completed 37 gas renovation projects for old residential communities. The company’s services are highly localized, focusing exclusively on the entire Pulandian District without engaging in overseas business. Potential collaboration areas include joint construction of gas infrastructure, integrated smart gas systems, safety upgrades for gas systems in old residential communities, customized gas supply solutions for commercial and industrial users, and Engineering, Procurement, and Construction (EPC) services for gas projects.

Poma (Shanghai) Environmental Technology Co., Ltd. is a high-tech enterprise specializing in industrial water treatment and environmental system integration solutions, dedicated to providing full-cycle water system optimization services to high-end manufacturing clients in sectors including electronic semiconductors, biopharmaceuticals, new-energy batteries, and fine chemicals. The company’s core business encompasses the design, research & development, equipment integration, and engineering implementation of reclaimed water reuse systems, zero-liquid-discharge (ZLD) systems for high-concentration wastewater, intelligent management and control systems for industrial circulating cooling water, membrane-based advanced treatment systems, and associated automated control systems. Leveraging a technical approach that combines multi-unit coupled processes (e.g., UF+RO+EDR+MVR staged concentration routes) with digital energy-efficiency management, the company offers integrated capabilities spanning process design, selection of core equipment (including proprietary anti-fouling reverse osmosis and specialty nanofiltration membrane elements), PLC/DCS automatic control programming, and commissioning & operation & maintenance. It holds four authorized invention patents, eleven utility model patents, and three software copyrights; representative achievements include the “PM-WaterPro Intelligent Diagnostic Platform for Industrial Water Treatment V1.0.” In terms of qualifications, the company holds Grade III specialized contracting qualification for environmental engineering projects and a Work Safety Production License, and has passed certifications under ISO 9001, ISO 14001, and ISO 45001 management system standards. Its core water treatment equipment has obtained the Hygienic Permit for Products Related to Drinking Water (Shanghai Health Water Permit No. 2024-XXXX). In recent years, the company has successfully delivered several projects, including: a 1,200-ton-per-day high-salinity wastewater MVR evaporation-crystallization system for a semiconductor materials enterprise in Suzhou; a classified, quality-specific treatment and nickel-cobalt resource recovery project for electroplating wastewater at a power battery manufacturing plant in Wuxi; and an upgraded purified water system EPC project for a CDMO pharmaceutical enterprise in Zhangjiang, Shanghai. All projects are concentrated in the Yangtze River Delta region, and cooperation models cover EPC general contracting, process package supply, supply of core equipment, intelligent upgrades, and customized operation & maintenance 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.