Jereh Group was founded in 1999 as an innovation-driven diversified industrial group. Its businesses span petroleum industrial clusters, natural gas industrial clusters, data center and power industrial clusters, and new energy industrial clusters, committed to providing customers with competitive, safe, and reliable products, services, and systematic solutions. Since its founding, we have taken sincerity as the cornerstone of Jereh's corporate culture. While continuously creating value for customers, we also contribute honesty, kindness, and respect to society. Today, our business operates in over 70 countries and regions, with more than 9,000 outstanding employees. We are open to cooperation with global partners, working together to build a more efficient and sustainable future. Currently, Jereh Group has two listed companies (Jereh Stock 002353, Deshi Stock 301158). It is a National Technology Innovation Demonstration Enterprise, National Intellectual Property Demonstration Enterprise, National Service-Oriented Manufacturing Demonstration Enterprise, and a National Quality Benchmark enterprise. The Group has 11 national high-tech enterprises and 1 National Pilot Demonstration Enterprise for Integration of New-generation Information Technology and Manufacturing. Driven by innovation, it has established more than 10 national and provincial-level scientific and technological innovation platforms, including a National Recognized Enterprise Technology Center, National Industrial Design Center, Shandong Technology Innovation Center, Shandong Manufacturing Innovation Center, and Shandong Engineering Research Center. It has 3 National Service-Oriented Manufacturing Demonstration Enterprises, 2 Shandong Science and Technology Leading Enterprises, and 3 Shandong Gazelle Enterprises. To date, it has undertaken over 90 national and local research projects, with 23 technological achievements reaching international leading standards, 11 achievements receiving provincial-level science and technology progress awards, and 4 achievements receiving provincial-level industrial design gold awards.

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.