Jereh Oil & Gas Engineering Co., Ltd. (hereinafter referred to as "Jereh Natural Gas") is a wholly-owned subsidiary of Yantai Jereh Petroleum Services Group Co., Ltd., with a registered capital of 1 billion yuan. With nearly 20 years of project accumulation and technological development in the oil and gas sector, we have achieved full industry chain development in natural gas, with business coverage spanning natural gas equipment manufacturing, gas power generation equipment, natural gas processing engineering, and terminal utilization. We can provide integrated natural gas industry solutions from feasibility planning, equipment design and manufacturing, project management, to station operation and maintenance as well as after-sales services. Jereh Natural Gas invests no less than 5% of annual sales revenue in R&D each year. After more than two decades of accumulation, Jereh Natural Gas has developed full lifecycle management capabilities from equipment R&D and production to delivery, with over 180 invention patents applied for across the entire industry chain. Jereh Natural Gas provides customized designs based on customer site conditions, offering integrated natural gas industry solutions from feasibility planning, equipment design and manufacturing, project management, to station operation and maintenance as well as after-sales services, ensuring safe and stable project operation. Jereh Natural Gas always adheres to a customer-centric approach, responding promptly to customer needs, and comprehensively solving various challenges faced by customers while eliminating potential risks in equipment operation and maintenance. 80% of our team members hold international HSE certificates, special operation permits, project manager certificates, and other credentials; over 70% of our operational personnel have more than five years of service experience. Survey and Design Qualifications: Engineering design/consulting/management qualifications, engineering survey qualifications, petroleum and natural gas (offshore oil) industry (oil and gas processing, oilfield surface) engineering design qualifications, pressure piping (vessel) design qualifications; Management Systems: American Petroleum Institute API Q1, Quality Management System ISO 9001, ASME Quality Assurance System, TSG Quality Assurance System; Manufacturing Qualifications: Canadian CRN registration/CWB steel structure welding qualification, American Welding Society CWI certification, ASNT non-destructive testing society certification, EU CE certification, MD/ATEX/PED, DNV, DOT, CDOT, SASO, CU-TR, and other certifications; As early as 2004, Jereh placed great emphasis on product innovation and patent application protection, especially for core products in the natural gas sector, investing no less than 5% of annual sales revenue in R&D each year. In the future, we will continue to focus on the competitive advantages brought by innovation and patents, firmly pursuing the path of R&D and innovation, so that Jereh Natural Gas can win in the future.

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.

PetroChina Kunlun Gas Co., Ltd. Dalian Gas Branch is a branch established by PetroChina Kunlun Gas Co., Ltd. in Dalian City, Liaoning Province, and is subordinate to China National Petroleum Corporation (CNPC). It is one of the primary urban gas suppliers in Dalian City, responsible for franchised gas supply operations in the urban districts and certain county-level towns, and deeply involved in constructing the regional natural gas security-supply system featuring “multiple gas sources, an integrated pipeline network, and coordinated planning.” The company’s core businesses include piped gas supply (serving residential, commercial, and industrial users), design and construction of gas facilities (holding Grade III General Contracting Qualification for Gas Engineering Construction), sales and installation of gas appliances, gas technical consulting, and comprehensive energy services; all licensed activities are governed by the Gas Business License (License No.: Liao 202302000001G). Leveraging CNPC’s upstream gas resource advantages and synergies with the Dalian LNG Receiving Terminal, the company possesses dual-gas-source security and emergency peak-shaving capabilities. As of the end of 2024, its operations cover key urban districts—including Xigang, Shahekou, Ganjingzi, and the High-Tech Industrial Development Zone—as well as parts of Jinpu New Area and Lvshunkou District, serving over 850,000 piped gas users with an annual gas supply volume of approximately 320 million cubic meters. The company has obtained ISO 9001, ISO 45001, and ISO 14001 certifications; has built a GIS-based digital pipeline network system integrated into Dalian City’s Urban Lifeline Safety Project Supervision Platform; has deployed over 720,000 NB-IoT smart gas meters at scale; achieves a remote meter-reading rate of 98.6%; and responds to abnormal-event alerts within ≤2 hours. Key projects successfully implemented include the relocation and modification of gas pipelines for Dalian Metro Line 5, dedicated gas pipelines for the Dalianwan Subsea Tunnel, and replacement of heating boilers with gas-fired systems in the Lvshun Economic Development Zone. Additionally, the company has launched a demonstration microgrid energy-supply project integrating “gas + photovoltaics + energy storage” in the High-Tech Industrial Development Zone. Areas of collaboration include gas infrastructure construction and renovation, comprehensive energy solutions for industrial and commercial customers, integrated intelligent gas-system solutions, application of corrosion-resistant PE piping technology for saline-alkali soils, and joint implementation of regional clean-energy substitution projects.