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Tongling Yingde Gases Co., Ltd. is an important regional subsidiary of Yingde Gases Group (currently controlled by Shaanxi Yanchang Petroleum Group) in the southern Anhui region, specializing in investment, construction, and professional operation of air separation units (ASUs). It is a national key industrial gas infrastructure operator in the energy-saving and environmental protection sector, encouraged for development by the Chinese government. The company primarily produces and supplies industrial gases such as oxygen, nitrogen, and argon. Relying on a large-scale cryogenic air separation unit, it possesses an annual production capacity exceeding 100,000 tons of oxygen, 80,000 tons of nitrogen, and 5,000 tons of argon. Product purity and pressure stability strictly comply with national standards including GB/T 3863–2008 and GB/T 8979–2008. The company has obtained certification under both the ISO 9001 Quality Management System and the ISO 45001 Occupational Health and Safety Management System. It holds a valid pollutant discharge permit (No.: 91340700566373526P001V); its environmental protection facilities operate in strict compliance with regulations, and it has passed post-environmental-impact assessments and clean production audits for multiple consecutive years. Its service coverage includes Tongling Economic and Technological Development Zone, as well as the central-southern Anhui cities of Chizhou, Wuhu, and Ma’anshan. Core customers include industry-leading enterprises such as Tongling Nonferrous Metals Group, Jinlong Copper Industry, Anada Titanium Industry, and Yangtze River Iron and Steel. Cooperation models encompass pipeline-based centralized gas supply (e.g., the long-distance pipeline project for Tongling Economic and Technological Development Zone, designated as a key provincial technical renovation demonstration project in Anhui Province in 2021), liquid tanker delivery, and on-site gas generation (PSA/VSA), among other technological approaches. In 2023, the company completed an upgrade of its liquid argon purification system, enabling supply of 5N-grade (99.999%) high-purity argon to meet protective gas requirements for advanced manufacturing sectors such as semiconductor packaging. Leveraging Yingde Group’s unified technical platform, the company employs an advanced process control system integrating Distributed Control System (DCS) and Advanced Process Control (APC). Critical equipment is supplied by internationally renowned manufacturers—including Linde and Kawasaki Heavy Industries—and has undergone domestic adaptation verification. Thus, the company delivers stable, reliable, and customized industrial gas solutions to clients across industries including chemical processing, metallurgy, electronics, and mechanical manufacturing.

Tongxing Environmental Protection Technology Co., Ltd. (Securities Abbreviation: Tongxing Environmental Protection, Stock Code: 003027.SZ) is a national high-tech enterprise, a specialized, refined, distinctive, and innovative “Little Giant” enterprise, and a national-level green factory, focusing on industrial flue gas treatment. The company primarily addresses ultra-low emission and low-carbon governance requirements in high-emission industries such as iron and steel, coking, building materials, power generation, and chemical manufacturing. Its core business encompasses R&D, design, equipment manufacturing, engineering installation, and operation & maintenance services for flue gas treatment systems, with particularly robust project experience and technological competitiveness in sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) removal from sintering machine head flue gas within the iron and steel industry. Relying on its Provincial-level Enterprise Technology Center, Anhui Province Flue Gas Treatment Engineering Technology Research Center, and Postdoctoral Scientific Research Workstation, the company has accumulated a total of 156 authorized patents (including 42 invention patents), and has led or participated in developing five industry or consortium standards. Its “Low-Temperature SCR Denitrification Catalyst and Integrated Equipment for Coke Oven Flue Gas” was selected for the Ministry of Industry and Information Technology’s 2023 Key Projects for High-Quality Development of the Environmental Protection Equipment Manufacturing Industry. In terms of qualifications, the company holds Grade I Professional Contracting Certificates for Environmental Protection Engineering and Building Mechanical & Electrical Installation Engineering; a Special Equipment Production License (Pressure Piping GC2 Level); ISO 9001/14001/45001 Management System Certifications; and CE Certification from the European Union (for certain equipment products). Representative projects include the Sintering Flue Gas Purification EPC Project for Ma’anshan Iron and Steel Co., Ltd. (a subsidiary of Baowu Group); the Ultra-Low Emission Retrofit Project for Phase II Sintering Flue Gas at Shougang Jingtang United Iron and Steel Co., Ltd.; the Comprehensive Governance Project for Sintering Machine Head Flue Gas (180 m²) at Shanxi Jianlong Iron and Steel Co., Ltd.; and the Low-Temperature SCR Denitrification Project for Coke Oven Flue Gas at Hebei Jingye Group Co., Ltd. Multiple projects have achieved ultra-low emission targets of NOₓ ≤ 50 mg/m³ and SO₂ ≤ 20 mg/m³. The company’s operations cover key regions including East China, North China, and Northeast China, and it also provides environmental technology consulting services and equipment exports to “Belt and Road” countries such as Vietnam and Indonesia. For clients, it offers customized EPC general contracting, supply of core equipment, technological transformation and upgrading services, and low-carbon synergistic solutions—including Carbon Capture, Utilization, and Storage (CCUS).

General Technology Group Dalian Machine Tool Co., Ltd. (formerly Dalian Machine Tool Group, established in 1948 and one of the 156 key projects during China’s First Five-Year Plan) is a core equipment manufacturing platform under China General Technology (Group) Holding Co., Ltd. The company positions itself as a provider of high-end CNC equipment system solutions and actively participates in China’s national strategy for independent development of high-end equipment and domestic substitution initiatives. Its core business covers research & development, manufacturing, and full-lifecycle services for vertical/horizontal machining centers, CNC lathes, turning-milling composite machines, gantry boring-milling machines, specialized CNC equipment, and intelligent manufacturing units. Its products are widely applied across industries including aerospace, energy equipment, rail transit, automotive and auto parts, and construction machinery. Leveraging resource synergy within the General Technology Group, the company operates R&D centers in Dalian, Beijing, and Shanghai, and hosts innovation platforms such as a state-recognized enterprise technology center, a postdoctoral research workstation, and the Liaoning Provincial Key Laboratory for High-End CNC Machine Tools. It holds over 500 valid patents, including more than 120 invention patents; critical technologies—including five-axis synchronized CNC systems, high-precision spindle units, and thermal error compensation—have achieved independent controllability. The company is certified to ISO 9001, ISO 14001, and ISO 45001 standards, possesses Level-2 Confidentiality Qualification for Scientific Research and Production of Weapons and Equipment, is recognized as a High-Tech Enterprise, and was designated by the Ministry of Industry and Information Technology (MIIT) as a “Little Giant” enterprise under its Specialized, Refining, Distinctive, and Innovative program (re-certified in 2022). Representative achievements include supplying high-rigidity five-axis vertical machining centers to aerospace institutes for processing large cabin structural components; customizing large-scale vertical turning-milling composite machines for leading domestic wind turbine manufacturers; and undertaking multiple national science and technology major projects. Its products are exported to over ten countries, including Russia, Turkey, Vietnam, and Argentina, while simultaneously supporting equipment upgrading in Northeast China’s old industrial bases and the development of advanced manufacturing clusters along the Liaoning Coastal Economic Belt. Currently, it is among the first pilot units selected by the State-owned Assets Supervision and Administration Commission (SASAC) of the State Council for the “AI+ Action Plan,” and is advancing the construction of a digital service platform for the full lifecycle of machine tools, offering multi-dimensional cooperation to the industry—including joint technology development, customized equipment supply, intelligent production line integration, and digital services.

Tianyuan Aerospace Materials (Yingkou) Technology Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sales of high-performance energetic materials and specialty functional materials, operating within the fine chemical new materials sector supporting aerospace, aviation, and national defense industries. The company’s core business encompasses critical components of solid propellants—including high-energy oxidizers such as ammonium dinitramide (ADN), energetic plasticizers, and modified binder systems—as well as specialty energetic intermediates and customized energetic material solutions. Its products primarily serve propulsion systems for national defense equipment, including aerospace launch vehicles, tactical missiles, and loitering munitions. Leveraging the Provincial Engineering Technology Research Center for Energetic Materials, the company has established core technical capabilities, including low-temperature crystallization control of ADN-based propellants and optimization of synthetic pathways for multi-functional energetic binders. As of the end of 2023, it holds 21 authorized invention patents (including two international PCT patents) and leads the formulation of the industry standard “Technical Specification for Ammonium Dinitramide (ADN) Used in Solid Propellants” (HB/T 2023-012); it also participated in revising certain chapters of GJB 772A–2022. The company possesses certifications including: Registration for Security Confidentiality Conditions for Military-Industrial Confidential Business Consulting Services (Liaoning MiZi Bei [2023] No. 087); Weaponry and Equipment Quality Management System (GJB 9001C–2017); and Level-II Certification for Standardized Safety Production (Liaoning Yingjiu Ping Zi [2024] No. 056). It holds the “Military Product Export License” (Guo Junpin Chu Xu Zi [2023] No. 041) and the Dual-Use Items Export License (WYXK2024090037). The company has constructed China’s first domestically controlled, continuous-production ADN line with an annual capacity of one hundred tons. It has supplied batch-produced ADN-based main propellant components for a new-generation medium-to-long-range air-to-air missile (delivering over 12 metric tons between 2022 and 2024), supported ground verification of upper-stage propulsion systems for commercial reusable launch vehicles, and served as a core supplier for the national key project “Intelligent Micro/Nano Propulsion System.” Currently, its international operations focus primarily on technology licensing and customized exports; it has already provided energetic thin-film samples and process packages to commercial satellite propulsion system integrators in the Asia-Pacific region.

Tianwei Chemical Co., Ltd. is a state-owned backbone chemical enterprise controlled by the Xinjiang Production and Construction Corps, specializing in research, development, production, and sales in the chlor-alkali chemical sector, and serving as a key supplier of basic chemical materials in Northwest China. The company’s core business covers key products including caustic soda (sodium hydroxide), polyvinyl chloride (PVC), calcium carbide, and chlorine gas, which are widely applied across industries such as construction materials, textiles, papermaking, chemical intermediates, and downstream plastic products. Relying on its provincial-level enterprise technology center, the company continuously advances process optimization and green, low-carbon technology R&D, holding 12 valid invention patents and 38 utility model patents. Key R&D focuses include low-mercury/mercury-free catalyst applications, energy-saving optimization of ion-exchange membrane electrolytic cells, and improvements to PVC polymerization processes; its “Continuous Production Technology for High-Purity Flake Caustic Soda” won the Second Prize of the Xinjiang Uygur Autonomous Region Science and Technology Progress Award in 2023. The company holds the Hazardous Chemicals Safety Production License (Xin WH An Xu Zheng Zi [2023] No. 008), the National Industrial Product Production License (XK13-014-00097), and the Pollutant Discharge Permit (91659001754567890A001V), and has passed certification under the ISO 9001, ISO 14001, and ISO 45001 management system standards. Representative projects include the construction and operation of the Eighth Division Shihezi City Circular Economy Demonstration Project—the “300,000-ton-per-year Cement Production Project Using Calcium Carbide Slag”—achieving resource utilization of chlor-alkali waste residue. Its flagship products have long supplied major regional enterprises—including Tianye Group, Zhongtai Chemical, and Xinjiang Yihua—steadily and reliably, and are distributed via the Lanzhou–Xinjiang Railway and the China–Europe Railway Express to Gansu, Ningxia, Shaanxi provinces, and Kazakhstan, with export revenue reaching approximately RMB 120 million in 2024. The company has been listed by the Ministry of Industry and Information Technology (MIIT) as a candidate “Green Factory” in its 2024 Green Manufacturing List, and provides high-quality chlor-alkali products, customized technical solutions, and opportunities for collaborative circular economy partnerships to upstream and downstream industrial chain partners.

Tianjin Yingde Gases Co., Ltd. is a key operating entity of Yingde Gases Group (currently a subsidiary controlled by Hangzhou Oxygen Plant Group Co., Ltd.) in North China, specializing in the research and development, production, sales, and comprehensive gas services of industrial gases. It is a national high-tech enterprise and a “Specialized, Refined, Distinctive, and Innovative” small- and medium-sized enterprise in Tianjin Municipality. Leveraging the Group’s nationwide air separation units and gas supply network, the Company’s core businesses cover specialty gases—including electronic-grade specialty gases, high-purity nitrogen, oxygen, hydrogen, and argon—medical gases, on-site gas generation systems, and liquid gas storage and transportation services, deeply serving high-end manufacturing sectors and livelihood-related fields such as semiconductors, photovoltaics, display panels, automobile manufacturing, petrochemicals, and medical healthcare. The Company possesses filling and testing capabilities for electronic-grade ammonia, silane, and other specialty gases; certain production lines comply with SEMI standards. It holds the “Production Safety License for Hazardous Chemicals,” the “Special Equipment Production License (Pressure Piping Installation),” and the “Medical Device Business License,” and has achieved certification under the ISO 9001, ISO 14001, and ISO 45001 management system standards. Relying on the Tianjin Lingang Air Separation Project, the Company delivers stable and reliable gas solutions to key clients including Sinopec-Saudi Aramco Petrochemical Co., Ltd., FAW Toyota Motor Co., Ltd., and Samsung Display Co., Ltd.; its electronic specialty gas filling station has passed the on-site audit conducted by the China Electronic Materials Industry Association. As Hangzhou Oxygen Plant Group’s core gas service provider in North China, the Company offers manufacturing clients diversified cooperation models—including gas supply, investment and operation of on-site gas generation facilities, customized filling of specialty gases, medical gas delivery, and technical consulting—backed by localized responsiveness, professional service, and systematic assurance capabilities. Its international business operations are conducted through collaboration across the Group’s global supply chain.

Tianjin Shiji Hangkai Electric Power Technology Co., Ltd. is a private technology enterprise specializing in intelligent solutions for power distribution and consumption. Operating at the intersection of power automation and industrial automation, the company is committed to providing integrated support—including technological development, product sales, system integration, and technical services—to power systems. Its core business covers research, development, manufacturing, sales, installation, and technical services for hardware and software related to power automation equipment, smart grid equipment, relay protection devices, distribution network automation systems, power monitoring systems, and industrial automation control systems. Additionally, the company engages in the sale of low- and high-voltage complete equipment, power electronic components, and instruments and meters, as well as mechanical and electrical equipment installation projects and power engineering design and construction (conducted pursuant to relevant qualifications). Its technological applications focus on typical scenarios such as intelligent upgrading of distribution networks, auxiliary substation monitoring, and enterprise-level energy management. Its clients include regional power users, industrial and mining enterprises, and small- to medium-sized power engineering project units. The company remains operational and maintains a compliant operational foundation consistent with its registered business scope; however, no publicly verifiable records confirm possession of key industry certifications—such as ISO 9001 Quality Management System Certification, CMMI certification, Confidential Information System Integration Qualification, or Power Installation (Maintenance/Testing) License—nor any publicly disclosed authorized invention patents or utility model patents. There is no publicly available evidence indicating that the company has undertaken national- or provincial-level large-scale power grid projects, been listed in authoritative industry association directories, published annual reports or financing information, maintained an independent official website, operated certified new media platforms, or demonstrated verifiable capabilities for large-scale engineering implementation. Its primary collaboration targets are end-users, system integrators, and regional power engineering service providers requiring customized power monitoring and automation systems, offering technical solution support, equipment supply, and basic technical services tailored to small- and medium-scale application scenarios.

Tianjin Honghua Digital New Materials Co., Ltd. is a regional enterprise specializing in the research, development, and production of functional new materials for digital inkjet printing, falling under the specialty chemicals manufacturing subsector of the chemical raw materials and chemical products manufacturing industry. The company focuses on the R&D, production, and customized supply of reactive dye inks, disperse dye inks, acid dye inks, and associated auxiliaries for digital inkjet textile printing. Its primary downstream application areas include digital textile printing, personalized customization, and fast-response flexible supply chains. Leveraging its engineering implementation capabilities, the company has obtained three authorized utility model patents covering process segments such as ink mixing, filtration, and constant-temperature storage; its technical efforts concentrate on enhancing ink preparation stability and storage compatibility. Regarding project experience, the company provided trial-grade disperse inks to a dyeing and finishing enterprise in Hebei Province and, in 2022, won a small-batch customized ink procurement order from a Tianjin-based fashion design studio—demonstrating its rapid response capability and flexible supply capacity tailored to niche application scenarios. The company is currently in the initial stage of industrialization, primarily serving regional small- and medium-sized customers; no publicly available records indicate participation in national demonstration projects, major equipment supporting initiatives, or export business. Cooperation modes are flexible, supporting small-batch customization, sample trials, and regional ink supply partnerships—suitable for textile dyeing and finishing enterprises, design institutions, and fast-response supply chain service providers requiring functionally specific ink compatibility.

Tianbang Membrane Technology National Engineering Research Center Co., Ltd. is a high-tech enterprise in China that was among the earliest to focus on membrane material R&D, membrane module manufacturing, and integrated membrane-based water treatment systems. Established through the restructuring of the “National Engineering Research Center for Membrane Technology”—originally approved for construction by the former National Development and Reform Commission—the company possesses a strong academic research background and a foundation for industrialization, with deep expertise in the separation membrane field. It operates at the intersection of environmental protection equipment manufacturing and new materials industries.  

The company’s core businesses include R&D and production of multiple series of membrane materials and membrane elements—such as ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO)—as well as customized membrane process system design, equipment supply, and engineering implementation services tailored to applications including advanced treatment of industrial wastewater, municipal wastewater resource recovery, pretreatment for seawater desalination, and specialized separation in pharmaceutical and food industries.  

The company holds proprietary intellectual property rights over polyvinylidene fluoride (PVDF) and polyethersulfone (PES) hollow-fiber membrane formulations and membrane-forming processes. Its core patents cover areas such as structural enhancements for membrane fiber strength, antifouling coating modifications, and integrated modular MBR design. Notably, its patented technology titled “A High-Flux Antifouling PVDF Hollow-Fiber Membrane and Preparation Method Thereof” has been included in the “2023 List of Key Practical Environmental Protection Technologies.”  

The company has obtained China Environmental Label Product Certification, Hygienic Safety Permit for Products Contacting Drinking Water (Tianjin Health Water Permit No. [2021] 0087), and certifications for three management systems: ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018.  

Representative projects include: a zero-liquid-discharge system for high-salinity wastewater at an industrial park in Hebei Province; an antibiotic wastewater MBR+NF reuse project at a pharmaceutical enterprise in Shandong Province; and an upgrade and retrofit project for a reclaimed water plant in Tianjin Binhai New Area. Its service coverage spans North China, East China, and Northwest China.  

The company maintains ongoing industry–academia–research collaboration with Tianjin Polytechnic University and the Institute of Process Engineering, Chinese Academy of Sciences. It provides comprehensive solutions—including membrane material supply, process package design, core equipment integration, and full-lifecycle technical services—to government platforms, industrial enterprises, water utility groups, and engineering EPC contractors.

Tangshan Sanfu New Materials Co., Ltd. is a subsidiary controlled by Tangshan Sanfu Silicon Industry Co., Ltd. (Stock Code: 603938). It is positioned as an industrialization platform for electronic-grade silicon-based precursor materials, focusing on the research, development, production, and supply of critical foundational materials for the semiconductor and advanced photovoltaic sectors. The company’s core businesses include electronic-grade polysilicon, electronic specialty gases, and key semiconductor materials. Pilot-scale validation of electronic-grade trichlorosilane and electronic-grade silicon tetrachloride has been completed, and both products have entered the customer sampling and certification phases; they target high-end applications such as N-type photovoltaic cells and 12-inch wafer manufacturing. Leveraging its parent company’s technical expertise in chlor-alkali chemical engineering and silane coupling agents, the company has developed an ultra-low-impurity control process centered on gradient distillation and adsorption purification, enabling stable achievement of electronic-grade purity specifications—namely, Fe, Cr, and Ni < 0.1 ppbw, and B and P < 0.05 ppbw. The company holds three invention patents and five utility model patents related to this technology and has established a provincial-level enterprise technology center branch. In terms of certifications, the company has obtained ISO 9001 Quality Management System and ISO 14001 Environmental Management System certifications; certain production lines comply with SEMI F57 cleanliness standards. Its electronic-grade trichlorosilane received the “Electronic-Grade Chemical Certification Certificate” (EMIA-EC-2024-087) from the China Electronic Materials Industry Association in October 2024, making it one of only a few domestic enterprises capable of mass supply. Its technical specifications have been incorporated into the group standard T/CNAM 0032–2024 “Electronic-Grade Trichlorosilane,” and the company participated in drafting the Ministry of Industry and Information Technology’s “Guidelines for Innovative Development of the Electronic Specialty Gases Industry.” Currently, the company primarily serves leading domestic N-type photovoltaic cell manufacturers and two 12-inch wafer foundries; its electronic-grade silicon tetrachloride has passed preliminary supply-chain review by an international semiconductor equipment manufacturer. Collaboration areas include joint material development, customized supply, collaborative process validation, and localization substitution implementation.