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.

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.

Shandong Jinjia Environmental Protection Co., Ltd. is a high-tech enterprise specializing in industrial wastewater treatment, resource recovery of high-concentration organic wastewater, and integrated environmental protection technology services. Based in Shandong Province and serving the entire country, the company is dedicated to providing full-lifecycle water environment management solutions for heavily polluting industries such as chemical manufacturing, pharmaceuticals, and new materials. Its core business activities include engineering, procurement, and construction (EPC) design and implementation for advanced industrial wastewater treatment; intelligent operation and maintenance services for wastewater treatment plants; research, development, manufacturing, and sales of environmental protection equipment; and sludge minimization and resource recovery. Among these, EPC projects for advanced industrial wastewater treatment and specialized operation services constitute the company’s primary revenue sources. Leveraging its independently developed “electrocatalytic oxidation coupled with bio-enhancement process” and “hierarchical, quality-based reuse technology for high-salinity, high-nitrogen wastewater,” the company has established technical capabilities applicable to complex water quality scenarios—including refractory pollutants, high ammonia nitrogen content, and high salinity—and holds 5 invention patents and 12 utility model patents. Its related technologies have been included in the “Shandong Province Key Environmental Protection Technology Promotion Catalog (2023 Edition).” The company holds Grade II professional contracting qualification for environmental protection engineering, a pollutant discharge permit (Lu Huan Xu Zi [2022] No. 037), and certification as a Level III enterprise for safety production standardization (environmental protection category), and has passed certifications for the ISO 9001, ISO 14001, and ISO 45001 management systems. Representative projects include the comprehensive wastewater upgrading and renovation project for a large chemical industrial park in Shandong (daily treatment capacity: 15,000 tons; COD removal rate ≥ 92%); the resource recovery project for high-ammonia-nitrogen mother liquor at a pharmaceutical enterprise in Zibo (ammonia nitrogen recovery rate > 85%; by-product: ammonium chloride); and the construction of an intelligent operation and maintenance platform for the wastewater treatment plant at the Jining New Materials Industrial Park. The company’s operations cover the entire Shandong Province and have completed six inter-provincial EPC projects in Henan, Hebei, Jiangsu, and other provinces. Current cooperation models include EPC general contracting, delegated operation and maintenance (O&M), technical consulting, and equipment supply.