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.

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.

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.

Liaoning Huafu Environmental Engineering Co., Ltd. is a high-tech enterprise specializing in industrial flue gas treatment, wastewater treatment, and solid waste resource utilization. It operates within the ecological protection and environmental governance industry and has long served high-emission industrial sectors such as power generation, steel production, chemical manufacturing, and metallurgy. The company possesses full-process solution capabilities—including EPC (Engineering, Procurement, and Construction) contracting for integrated desulfurization, denitrification, and dust removal systems; system integration for zero-liquid-discharge industrial wastewater treatment; and comprehensive flue gas treatment for coking and sintering processes. Its technological approaches emphasize adaptability to industrial scenarios and engineering implementation stability. Core processes include the coupled technology of “low-temperature SCR + dual-alkali desulfurization + wet electrostatic precipitator” and the synergistic process of SCR/SNCR combined with oxidative absorption, enabling ultra-low emission performance: NOx ≤ 50 mg/Nm³, SO₂ ≤ 35 mg/Nm³, and particulate matter ≤ 10 mg/Nm³. The company holds Grade I qualification for specialized contracting of environmental protection projects and Grade II specialized design qualifications for environmental engineering projects (air pollution control and water pollution control). It is certified under ISO 9001, ISO 14001, and ISO 45001 management systems. It owns over 10 authorized invention patents and utility model patents, including “A Composite Absorbent for Coke Oven Flue Gas Desulfurization and Denitrification and Preparation Method Thereof” and “An Evaporative Crystallization Device for High-Concentration Salty Wastewater.” Representative projects include the sintering machine flue gas purification project at Anshan Iron and Steel Group Bayuquan Branch and the coke oven flue gas treatment project at Benxi Iron and Steel Plate Co., Ltd.—both key industrial retrofit projects in Northeast China. Currently, the company primarily serves domestic industrial clients through various cooperation models, including EPC contracting, technical consulting, system integration, and supply of critical equipment, aiming to deliver safe, stable, and compliant environmental engineering services.