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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 Yanjin Construction Engineering Technology Co., Ltd. is a regional small- and medium-sized enterprise specializing in construction engineering technical services. Based in the Beijing-Tianjin-Hebei region and deeply rooted in the local Tianjin market, the company focuses on application-oriented technical services and specialized subcontracting as its core business model. Its primary business activities include construction engineering technology development, consulting, transfer, and services; design and construction of building intelligent systems; application of Building Information Modeling (BIM) technology; consulting on green building and energy-saving renovation technologies; engineering testing technical services; and full-process engineering consulting services—including cost estimation, supervision, and project management. Leveraging a mature BIM toolchain and China’s national Green Building Assessment Standard (GB/T 50378), the company possesses solid practical capabilities in energy-saving renovations, intelligent system integration, and BIM-based collaborative management for existing public buildings, schools, and industrial parks. The company has obtained ISO 9001 Quality Management System certification and holds the following certificates issued by the housing and urban-rural development authorities: “Engineering Design Qualification Certificate” (Specialized Grade B for Architectural Decoration Engineering Design), “Construction Enterprise Qualification Certificate” (Grade II Professional Contracting for Architectural Decoration and Renovation Engineering), and “Engineering Consulting Unit Credit Certificate” (Grade C). Project experience is documented in bid award announcements published on the Tianjin Public Resources Trading Platform and the Binhai New Area Housing and Urban-Rural Development Commission website. Its clients primarily include government-funded projects and supporting projects undertaken by private real estate developers. The company provides technical support and collaborative services—from preliminary consulting and specialized design to system integration and full-process engineering consulting—to construction entities, design institutes, general contractors, and operating entities.

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.

Tianjin Dengta Paint Industry Development Co., Ltd. is the designated successor entity of the original state-owned time-honored brand “Tianjin Dengta Paint,” and is controlled by Tianjin Bohai Chemical Industry Group. It ranks among China’s oldest and most technically profound enterprises in the paint industry, positioning itself within the national strategic emerging industries—specifically, “advanced foundational materials” and “high-end specialty chemicals.” The company focuses on research and development, production, and technical services for high-performance industrial coatings. Its core business covers sectors including aerospace, rail transit, marine engineering, energy equipment, automotive manufacturing, and high-end equipment manufacturing. Key products include waterborne, high-solids, and solvent-free industrial coatings; specialty functional coatings (e.g., conductive, thermal-insulating, and radar-stealth-compatible coatings); military-industrial supporting coatings; and green coating process packages. The company possesses end-to-end capabilities spanning resin synthesis, formulation design, coating application processes, and technical services. It hosts a Tianjin Municipal-recognized enterprise technology center and a key laboratory for waterborne industrial coatings, participates in formulating multiple national and industry standards, and holds over 30 valid invention patents. Its technological roadmap emphasizes environmental friendliness, functionality, and customization. In terms of certifications, the company complies with ISO 9001, ISO 14001, and ISO 45001 management systems; holds Grade II Confidentiality Qualification for Scientific Research and Production Units of Weapons and Equipment; and is certified under GJB 9001C–2017, the national military standard quality management system. Some of its products have obtained certifications from the China Classification Society (CCS), Germanischer Lloyd (GL), DNV GL (formerly Det Norske Veritas), and compliance declarations under the EU REACH regulation. Representative applications include protective coatings for the Long March series launch vehicles; coatings supplied to CRRC Qingdao Sifang and CRRC Changchun Railway Vehicles for high-speed train sets; long-term corrosion-protection systems for CNOOC’s Bohai Oilfield; coating solutions for Beijing-Tianjin-Hebei region metro systems—including Beijing Metro; and projects along the Belt and Road Initiative, such as anti-corrosion engineering for the Karachi Nuclear Power Plant in Pakistan and coating solutions for port machinery in Southeast Asia. The company operates primarily in the Beijing-Tianjin-Hebei region while serving the entire country, offering collaborative services including customized R&D, joint technical breakthroughs, domestic substitution support, and comprehensive green coating solutions.

Tianchen Chemical Co., Ltd. is a regional manufacturer specializing in the research, development, and production of fine chemical intermediates. With over two decades of expertise in the field of organic chemicals, the company focuses on process optimization and application of continuous production technologies for aromatic amine compounds. Its core products include modified downstream intermediates of p-phenylenediamine (PPD) and key components of rubber antioxidant TMQ. These products primarily serve domestic customers in the rubber products sector—such as tire manufacturers and rubber hose enterprises—and the company possesses stable industrial-scale supply capabilities. Leveraging its independently improved reactor temperature-control structure and continuous distillation equipment (holding three utility model patents), the company has developed equipment compatibility advantages in the synthesis and purification of specific nitro compounds and aniline derivatives; its technical approach is pragmatic, and its production lines operate maturely. The company holds the “Safety Production Permit for Hazardous Chemicals” (Lü WH Anxu Zheng Zi [202X] XXXX), with its permitted scope covering large-scale production of related intermediates, valid until 2026. It is also certified under GB/T 19001–2016 Quality Management System and GB/T 45001–2020 Occupational Health and Safety Management System, reflecting its standardized production management capability. As a hazardous chemicals producer classified by the Shandong Provincial Department of Ecology and Environment and the Zibo Municipal Emergency Management Bureau as having general risk level, the company consistently complies with regulatory operational requirements and implements risk classification and control measures. Currently, its business is concentrated solely in the domestic market; no publicly available information indicates participation in overseas projects or international registrations. Regarding upstream and downstream industries in the value chain, the company is open to practical cooperation in areas including customized intermediate development, collaborative process optimization, stable bulk supply, and technical adaptation support.

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 Zhonghao Chemical Co., Ltd. is one of the key production bases of the chemical division of Xuyang Group, specializing in deep processing of coal tar and fine chemical production based on benzene-series compounds, with a strategic focus on research, development, production, and sales of high-value-added coal-based chemicals. The company’s core businesses include hydrogenation refining of crude benzene, coal tar distillation, carbon black oil processing, washing oil refining, and separation and purification of over 30 fine chemical products—such as methylnaphthalene, quinoline, and indole—whose applications span dyes, pharmaceuticals, agrochemicals, rubber auxiliaries, and new materials industries. Leveraging its 200,000-ton-per-year crude benzene hydrogenation unit for producing pure benzene, its 150,000-ton-per-year coal tar distillation unit, and associated refining systems, the company employs hydrogenation refining, precision fractional distillation, and continuous extraction as its core technological pathways, enabling highly efficient, targeted separation and high-purity purification. Its flagship products—including industrial naphthalene, quinoline, and methylnaphthalene—achieve purity levels exceeding 99.5%, with certain specifications surpassing those stipulated in GB/T 2600–2021 and ASTM D1319. The company has obtained certifications for ISO 9001, ISO 14001, and ISO 45001 management systems; holds the “National Industrial Product Production License” (for hazardous chemical organic products), the “Work Safety Production License,” and the “Pollutant Discharge Permit”; and has completed safety instrumented system (SIS) upgrades across all major production facilities, passing compliance reviews conducted by the Hebei Provincial Department of Emergency Management. It operates a provincial-level enterprise technology center and owns eight invention patents and fifteen utility model patents, among which the “Regeneration Process for Crude Benzene Hydrogenation Catalyst” and the “Continuous Directional Extraction and Separation Method for Coal Tar Fractions” have been successfully commercialized. Deeply integrated into Xuyang Group’s integrated coking base, the company has established a short-process, low-carbon, circular model spanning “coking → chemical by-products → fine chemicals.” Its products serve markets across East and South China and are exported to countries including India, South Korea, and Brazil; its foreign trade export value in 2023 totaled approximately RMB 120 million. The company offers diversified cooperation models for upstream and downstream enterprises, including customized raw material refining, collaborative utilization of by-product resources, technology licensing, and joint R&D.

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.