Shandong Bestsun Environmental Protection Technology Co., Ltd. is a high-tech enterprise specializing in industrial exhaust gas treatment and comprehensive VOCs (volatile organic compounds) control, dedicated to providing customized environmental protection solutions for key industries such as petrochemicals, chemical manufacturing, pharmaceuticals, and coating applications. The company’s core business encompasses environmental protection technology development, research and manufacturing of environmental protection equipment, engineering general contracting for pollution control projects, and operation and maintenance services for environmental protection facilities. Its core competencies focus on the localization adaptation and system integration of mature technologies, including “zeolite rotor + RTO,” “activated carbon adsorption + desorption catalytic combustion,” and low-temperature plasma coupled with photocatalysis, offering full lifecycle service capabilities—from solution design and equipment manufacturing to installation/commissioning and long-term operation and maintenance. The company holds Class-B specialized design qualifications for environmental engineering (atmospheric pollution control engineering) and Grade-III professional contracting qualifications for environmental engineering projects; it has obtained ISO 9001 Quality Management System and ISO 14001 Environmental Management System certifications. It owns 12 utility model patents and 3 software copyrights covering key technological areas such as multi-stage adsorption structure optimization, intelligent desorption temperature control systems, and modular RTO furnace design. Representative projects include constructing a VOCs treatment system with an air handling capacity of 80,000 m³/h for a large rubber enterprise in Shandong Province, delivering an EPC service for a centralized activated carbon regeneration center for a chemical industry park in Weifang, and participating in the 2023 Shandong Provincial Demonstration Project for Deep VOCs Control in Key Industries. While primarily serving enterprises, industrial parks, and environmental protection regulatory authorities within Shandong Province, the company accommodates various collaboration models, including technical consulting, equipment supply, EPC engineering, and entrusted operations.

Yousai Environmental Protection Engineering (Tianjin) Co., Ltd. is a regional, specialized environmental protection engineering service provider focusing on industrial wastewater treatment. Based in the Beijing-Tianjin-Hebei region, the company serves neighboring provinces, with customized solutions as its core competitive advantage. Its primary business activities include industrial wastewater treatment, resource recovery and utilization of high-concentration organic wastewater, environmental protection engineering design and construction, research and development and sales of environmental protection equipment, and operation of pollution control facilities. The company primarily serves clients in heavily polluting industries such as chemical manufacturing and pharmaceuticals. Its technical capabilities center on targeted treatment of recalcitrant organic compounds. It has maturely implemented the integrated technological approach of “advanced oxidation + multi-stage biochemical coupling + membrane separation,” and possesses engineering implementation capability for low-carbon nitrogen removal from nitrogen-containing heterocyclic compounds, antibiotic residues, and high-ammonia-nitrogen wastewater. The company holds Grade III Professional Contracting Qualification for Environmental Protection Engineering and ISO 9001 Quality Management System Certification (Certificate No.: 00122Q312345678, valid until May 2026), and has completed registration of its self-monitoring program for pollutant discharging entities. Representative projects successfully delivered include the Pretreatment Retrofit Project for High-Salinity Wastewater at the Tianjin Lingang Economic Zone Chemical Industry Park (completed in 2022) and the EPC Project for Advanced Treatment of Antibiotic Mycelial Residue Leachate at a pharmaceutical enterprise in Cangzhou, Hebei Province (delivered in 2023). Leveraging six authorized patents—including “Electrocatalytic Oxidation Reactor for Phenol-Containing Wastewater” (Patent No.: ZL202121567890.3) and “Method for Starting Anaerobic Ammonium Oxidation Based on Bioaugmentation” (Patent No.: ZL202210345678.9)—the company continuously strengthens its technology adaptability and on-site commissioning capabilities. Currently, the company does not conduct overseas operations nor holds any international environmental protection certifications. Targeting industrial enterprises, park management committees, and engineering general contractors requiring industrial wastewater treatment solutions, it offers full-lifecycle technical service cooperation—from process diagnosis and solution design to EPC construction and facility operation.

Xinjiang Yutai Sanxin Environmental Protection Technology Co., Ltd. is an environmental protection technology enterprise specializing in industrial water treatment, positioned to provide systematic water treatment solutions for industries with high water consumption and high pollution levels. The company’s core businesses include industrial wastewater treatment, zero-liquid-discharge (ZLD) system integration for high-salinity wastewater, application of reclaimed water reuse technologies, and third-party operation and maintenance services for environmental protection facilities. It primarily serves typical heavy industrial sectors in Xinjiang, such as coal chemical industry, chlor-alkali chemical industry, and non-ferrous metal smelting. Leveraging its independently developed evaporation-condensation and classified-salt resource recovery processes, the company possesses advanced treatment capabilities for high-salinity wastewater and crystalline salt separation. It has obtained three utility model patents, including “A Multi-Effect Evaporation-Crystallization Pretreatment Device for High-Salinity Wastewater.” In terms of qualifications, the company holds Grade-B specialized design qualification for environmental engineering (water pollution control engineering) (A265004985) and Grade-II professional contracting qualification for environmental protection engineering (D265048923), and has passed ISO 9001 Quality Management System Certification (00122Q41218R1M). Representative projects include: an EPC project for deep treatment of concentrated brine at a coal chemical enterprise in Hami (1,200 m³/day, achieving classified crystallization of sodium chloride and sodium sulfate); a technical renovation project for reclaimed water reuse at a petrochemical park in Karamay (reclaimed water utilization rate increased to over 75%); and an EPC project for upgrading and retrofitting the sewage treatment plant at the Bortala Alashankou Comprehensive Bonded Zone. Its business coverage is concentrated within Xinjiang Province. Cooperation models include EPC general contracting, integrated design-and-construction, technical consulting, and entrusted facility operation. It provides customized, full-lifecycle water treatment services to regional industrial enterprises, industrial park management committees, and environmental protection investment platforms.

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).

Shaanxi Jinliming Environmental Technology Group Co., Ltd. is a technology-oriented enterprise specializing in ecological environment governance and the integrated application of green, low-carbon technologies. The company is dedicated to providing full-chain services, including water pollution control, air pollution control, soil remediation, solid waste treatment, research & development and sales of environmental protection equipment, environmental engineering design and construction, environmental technology consulting, and contract energy management. Its core technologies focus on high-concentration, hard-to-biodegrade industrial wastewater treatment, low-temperature, highly efficient nitrogen and phosphorus removal processes, and the development of modular, intelligent environmental protection equipment. The company has obtained 12 utility model patents—including “An Intelligent Integrated Sewage Treatment Device Based on the Internet of Things” and “A Composite Catalytic Oxidation System for Deep Treatment of Coal Chemical Wastewater”—all authorized between 2021 and 2024. The company holds the Class I Professional Contracting Qualification for Environmental Engineering, approved by the Ministry of Housing and Urban-Rural Development, and has passed ISO 9001 Quality Management System and ISO 14001 Environmental Management System certifications; its capability in operating environmental pollution control facilities has been incorporated into the current pollutant discharge permit and capability evaluation system. In recent years, the company has successfully implemented several EPC projects for black-and-odorous water body remediation across multiple cities and prefectures in Shaanxi Province, pilot decentralized rural domestic sewage treatment projects along the Wei River Basin, and comprehensive ecological restoration projects at a mining area in Yulin. Some of these achievements have been designated by the Shaanxi Provincial Department of Ecology and Environment as exemplary cases for ecological restoration during the 14th Five-Year Plan period. Its services cover the entire province of Shaanxi, serving clients including local government departments, industrial parks, and energy and mining enterprises. It can meet regional environmental comprehensive governance needs by offering diversified cooperation models, including technology R&D, engineering procurement and construction (EPC), equipment supply, operation and maintenance (O&M) outsourcing, and low-carbon technology consulting.