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.

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).

Jiangsu Qianyan Environmental Technology Co., Ltd. is registered in Jiangning District, Nanjing City, Jiangsu Province. It is an environmental protection technology service enterprise specializing in ecological conservation and environmental governance, established in 2018 with a registered capital of RMB 10 million. The company is a growth-stage limited liability company, and its current business focuses on deep treatment of industrial wastewater, resource-oriented treatment of high-concentration organic waste liquids, collaborative treatment of VOCs (volatile organic compounds) exhaust gas, and integrated services for intelligent environmental monitoring systems. Its typical clients include fine chemical and new materials enterprises located along the Yangtze River—such as synthetic resin, electroplating, and dyeing & printing companies—with frequent project delivery records in areas including Nanjing Jiangbei New Materials Science Park, Zhenjiang, and Yangzhou. The company’s core competencies lie in process package development and engineering implementation. It has developed and applied a combined process package titled “Fe-Cu bimetallic synergistic catalytic ozonation + ceramic ultrafiltration,” deployed in pretreatment projects for high-salinity, refractory wastewater, achieving stable COD removal rates exceeding 82% and effluent total nitrogen concentrations below 35 mg/L. Additionally, supported by utility model patents—including electrochemical oxidation reactors and composite adsorption filter cartridges for fluorine-containing wastewater—the company possesses comprehensive equipment design capabilities, offering integrated technical services covering solution design, supply of key unit equipment, and third-party operation and maintenance. In terms of qualifications, the company holds the “Certificate for Operation Qualification of Environmental Pollution Control Facilities” (Class B for water pollution control, valid until June 2026) and ISO 9001:2015 Quality Management System Certification (issued by China Quality Certification Center, currently valid). Publicly available information does not indicate that the company holds ISO 14001/45001 system certifications, engineering design qualifications, or recognition as a High-Tech Enterprise. Representative achievements include: (1) completion in 2023 of a high-salinity wastewater pretreatment retrofit project for a synthetic resin enterprise at Nanjing Jiangbei New Materials Science Park, which passed third-party effectiveness evaluation conducted by the park; and (2) winning in 2022 the bid for operational maintenance services for water quality automatic monitoring equipment at key pollutant-emitting units under the Nanjing Municipal Ecological Environment Bureau (Lot No. 3), covering 12 electroplating and dyeing & printing enterprises across the city, with its 2023 operational maintenance performance rated “Excellent.” Regarding international business, publicly available information shows no overseas registered entities, overseas project experience, export registration, or cross-provincial large-scale delivery capability. Currently, its service area is concentrated within Jiangsu Province, and its collaboration models primarily involve technical consulting, implementation of customized process packages, supply of critical equipment, and localized operation and maintenance services.

Henan Sinoma Environmental Protection Co., Ltd. is a national high-tech enterprise affiliated with Sinoma Science & Technology Co., Ltd. (Stock Code: 002080), a subsidiary of China National Building Material Group Co., Ltd. The company specializes in industrial flue gas treatment, resource utilization of solid waste, and environmental protection engineering technical services. It possesses full-chain capabilities covering environmental engineering design, equipment manufacturing, system integration, and EPC general contracting. Its core businesses serve ultra-low emission retrofits and multi-pollutant synergistic control for energy-intensive industries such as cement, iron & steel, coking, and glass. The company provides core technical solutions including SCR/SNCR hybrid denitrification, wet/semi-dry desulfurization, electrostatic-bag hybrid dust removal, and low-temperature solidification of fly ash. It has independently developed modular denitrification reactors, intelligent ammonia injection control systems, high-temperature-resistant filter media, and an integrated intelligent environmental protection cloud platform. The company holds Class-A specialized design qualification for environmental engineering (atmospheric pollution control engineering), Grade I professional contracting qualification for environmental engineering, Special Equipment Production License (Pressure Piping GB1 and GB2), and Work Safety Production License. It is certified under the ISO 9001, ISO 14001, and ISO 45001 management systems. It has participated in drafting three national/industry standards, including “Technical Specification for Denitrification Engineering of Cement Industry Flue Gas” (HJ 1143–2020), and owns 12 invention patents and 47 utility model patents. Its representative projects span over 20 provinces nationwide, delivering ultra-low emission retrofit services for more than 60 clinker production lines for leading enterprises such as Conch Cement, Huaxin Cement, Jidong Cement, and Tianshan Materials; the largest single-project contract value exceeds RMB 230 million. Mature applications also exist outside the cement sector, including comprehensive flue gas treatment for a 5-million-ton-per-year sintering machine at a steel enterprise in Shanxi Province and deep purification of photovoltaic glass melting furnaces in Inner Mongolia. Its business focuses on East China, North China, and Central/Western China, while expanding into Southeast Asian markets—including Vietnam and Indonesia—through China National Building Material International Engineering Group’s distribution channels. Serving industrial enterprises, design institutes, EPC contractors, and local governments, it offers diversified cooperation models, including technical consulting, customized equipment supply, EPC general contracting, operation & maintenance outsourcing, and intelligent platform integration.

Dalian Shipbuilding Industry Group Co., Ltd. (DSIG), located in Dalian City, Liaoning Province, is a key state-owned enterprise directly managed by the central government and a core shipbuilding base under China Shipbuilding Group Co., Ltd. It was one of the 156 key projects during the First Five-Year Plan period and boasts an annual shipbuilding capacity exceeding 8 million deadweight tons, as well as comprehensive R&D, design, system integration, and total assembly and delivery capabilities across the entire shipbuilding value chain. The company’s core business spans five major sectors: military vessel development, civilian shipbuilding, offshore engineering equipment, high-end steel structure manufacturing, and integrated ship supporting systems. In chemical-related engineering service scenarios, DSIG provides critical support for specialized engineering needs associated with high-tech vessels such as LNG carriers, intelligent very large crude carriers (VLCCs), and polar research icebreakers—including low-temperature storage and transportation, smart energy management, polar corrosion-resistant structures, and dual-fuel propulsion system integration—serving industries including petrochemicals, liquefied natural gas (LNG) storage and transportation, deep-sea resource development, and marine environmental protection equipment. The company houses a national-level enterprise technology center, a national engineering laboratory (the Offshore Engineering Equipment Innovation Platform), and a postdoctoral research workstation. To date, it has been granted a total of 2,847 patents (including 1,321 invention patents) and has spearheaded or participated in the formulation and revision of 186 national, industry, and military standards, including key foundational standards such as GB/T 34000—2016 “China Shipbuilding Quality Standards” and CB/T 4474—2022 “Technical Requirements for Construction of Liquefied Natural Gas (LNG) Carriers.” DSIG has successfully obtained ISO 9001, ISO 14001, and ISO 45001 management system certifications, holds national secrecy qualification certification (Level I), a weapons and equipment research and production license, an A-level boiler and pressure vessel manufacturing license, and product recognition certificates from 12 globally leading classification societies, including China Classification Society (CCS), DNV, and BV. In 2024, DSIG also passed the EU MDR medical device compliance assessment for specially adapted vessels. Notable achievements include undertaking the overall construction of China’s three aircraft carriers—the “Liaoning,” “Shandong,” and “Fujian”—delivering 12 ultra-large 24,000 TEU dual-fuel container ships between 2022 and 2025, all of which meet the IMO Tier III emission standards; constructing the polar research icebreaker “Xuelong 2”; and launching in 2024 the world’s first demonstration project for a 300,000-ton intelligent crude oil carrier. Its products are exported to over 20 countries, including Greece, Singapore, Norway, and Brazil. In 2025, international orders will account for 41.7% of its total output. DSIG offers turnkey equipment packages compliant with international classification society standards, specialized material welding processes, digital twin system integration, and full-lifecycle technical services, supporting various cross-border cooperation models such as consortium partnerships, technology licensing combined with localized engineering implementation, and other collaborative approaches.