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Hainan Yisheng Petrochemical Co., Ltd. was established on May 31, 2010, in the Yangpu Economic Development Zone, Hainan Province, with a registered capital of 4.58 billion RMB. Its production facility is located on the west side of Binhai Avenue within the Yangpu Petrochemical Functional Zone, covering an area of ​​approximately 1,400 mu (about 93 hectares). The company currently employs over 650 people. It is a joint venture between two industry leaders—Hengyi Petrochemical and Rongsheng Petrochemical—and serves as a core PET (polyethylene terephthalate) resin production base within the Yisheng group. The company has been recognized as a "National-Level Green Factory" and a "High-Tech Enterprise." With an annual PET production capacity of 2 million tons, the company operates multiple polymerization lines that were commissioned in phases. Its product portfolio includes bottle-grade PET resin, amorphous PET chips, and recycled PET (rPET) resin—with key product grades such as YS-C01, YS-W01, YS-H01, YS-Y01, YS-W100R, and YS-C100R. These products hold FDA certification for food-contact applications and are used in a wide range of downstream sectors, including drinking water bottles, food packaging, films, and chemical fibers, with a significant volume exported to markets worldwide. The company continuously advances its production processes and pursues digital transformation. By implementing various technical upgrades focused on energy conservation and emission reduction, it consistently lowers energy consumption and pollutant emissions, adhering to a path of "green manufacturing." The enterprise has established a comprehensive safety management system, strictly complying with safety standards for the petrochemical industry. Furthermore, the company actively fulfills its social responsibilities by supporting initiatives such as agricultural development, educational aid, and ecological conservation. It balances business operations and employee development with contributions to the regional economy. Leveraging the strategic location of the Yangpu port, the company benefits from efficient logistics for the inbound transport of raw materials and the outbound shipment of finished products, ensuring a steady supply of high-quality polyester materials to both domestic and international customers.

Established in March 2003 and registered in the Beilun Economic and Technological Development Zone of Ningbo, Zhejiang Yisheng Petrochemical Co., Ltd. is a joint venture between Hengyi Group and Rongsheng Group. It stands as one of China’s earliest large-scale Purified Terephthalic Acid (PTA) projects invested in and developed by private enterprises. Spanning 1,030 mu (approximately 68.7 hectares), the company is recognized as a national-level high-tech enterprise and holds numerous patents related to PTA oxidation, tail-gas treatment, and wastewater treatment. Its core business focuses on the production of Purified Terephthalic Acid (PTA) and Isophthalic Acid (IPA), with a total designed annual capacity of 2 million tons. Serving as the management hub for the Yisheng industrial cluster, the company oversees various petrochemical production entities—including those in Hainan, Dalian, and Ningbo—managing assets exceeding 45 billion RMB and generating annual revenues surpassing 100 billion RMB. As a key supplier of upstream raw materials for the polyester industry chain, Zhejiang Yisheng produces PTA, which serves as a fundamental feedstock for manufacturing PET polyester chips, polyester filament, films, and engineering plastics. The company’s products are supplied to polyester manufacturers across China and are also exported extensively to international markets. With deep-rooted expertise in safety management, environmental protection, and process optimization, the company continuously implements energy-saving technical upgrades for its legacy facilities. It has also integrated environmental infrastructure—such as reclaimed water reuse systems and Regenerative Thermal Oxidizers (RTO) for waste-gas treatment—to facilitate resource recycling. By establishing a robust technical R&D platform, the company consistently enhances product purity while reducing unit consumption. Leveraging the logistical advantages of the Port of Ningbo, it has built a stable network for raw material procurement and finished-product distribution, cementing Yisheng’s position as a global leader in the PTA industry.

Yisheng Dalian Petrochemical Co., Ltd. was established in April 2006 and is located in the Dagushan Petrochemical Industrial Park within the Dalian Economic and Technological Development Zone. With a registered capital of 2.45645 billion RMB, the company is controlled by Dalian Yisheng Investment. It is recognized as a national-level "Little Giant" enterprise (specializing in niche markets with cutting-edge technologies), a national-level "Green Factory," and a high-tech enterprise. It serves as a core petrochemical production base for Yisheng’s operations along the northern coast. The company’s Phase I PTA (purified terephthalic acid) plant commenced production in 2009. Following subsequent expansions, its total annual PTA production capacity reached 3.7 million tons. Additionally, the facility includes polyester chip production lines with an annual capacity of 1.5 million tons for PET bottle-grade chips. Its product portfolio encompasses both PTA raw materials and multifunctional PET polyester chips, catering to markets in Northern China as well as international customers in Northeast Asia. The project was initiated in response to the national strategy for revitalizing the old industrial base in Northeast China. It incorporates a new generation of PTA production technology, featuring a high proportion of domestically manufactured equipment, which significantly reduces both construction and operational costs. Situated adjacent to a port terminal, the facility benefits from excellent maritime logistics, enabling an integrated supply chain—from the import of raw material PX (paraxylene) to the export of PTA and polyester products. The company consistently conducts clean production audits, optimizes processes for the treatment of wastewater, exhaust gases, and solid waste, and actively implements technical upgrades focused on waste-heat recovery and energy conservation. Its products are widely supplied to downstream manufacturing sectors, including PET bottle-grade chips, chemical fibers, and films. Furthermore, the company continuously develops differentiated polyester materials and expands its product specifications, providing a stable supply of raw materials for the polyester industrial chain in Northern China.

Established in November 2017 and registered in the Ningbo Petrochemical Economic and Technological Development Zone, Zhejiang Yisheng New Materials Co., Ltd. is a joint venture between Hengyi Petrochemical and CICC Petrochemical. As a new-generation, large-scale PTA (purified terephthalic acid) production base within the Yisheng system, the company is recognized as a provincial-level water-saving enterprise and currently employs nearly 400 people. The company has developed a large-scale PTA project with an annual capacity of 6 million tons, implemented in two phases with a total investment of approximately 6.731 billion RMB. The project utilizes industry-leading, eco-friendly PTA production technologies; its large-scale individual production units achieve top-tier efficiency in terms of energy and material consumption. Furthermore, the facility features robust systems for waste-heat recovery and water recycling, delivering significant results in water conservation and emission reduction. The company primarily produces high-quality PTA, while also providing thermal energy supply services. As a core raw material in the polyester industrial chain, its products serve downstream sectors such as PET bottle chips, polyester fibers, films, and engineering plastics. Leveraging the comprehensive industrial chain and port advantages of the Ningbo Petrochemical Zone, the company benefits from highly efficient raw material transport, warehousing, and maritime export logistics, supplying both the domestic market and a substantial volume for overseas export. Committed to technological innovation, the company holds numerous patents for the resource-efficient utilization of PTA and is actively advancing the development of a digital, intelligent factory. By strictly upholding safety and environmental protection standards and continuously optimizing product quality, the company contributes to maintaining Yisheng’s position as the world’s largest producer of PTA.

Established in December 2005 and registered in the Dagushan area of ​​the Dalian Economic and Technological Development Zone, Dalian Yisheng Investment Co., Ltd. has a registered capital of 2.018 billion RMB. Its ownership structure consists of a 70% stake held by Rongsheng Petrochemical and a 30% stake held by Hengyi Petrochemical. The company serves as the core investment and holding platform for the "Yisheng" business segment, jointly established by its two major shareholders, Hengyi and Rongsheng. Its primary business scope encompasses equity investment in petrochemical projects, domestic general trade, the import and export of goods and technologies, and trade agency services. The company does not engage directly in the manufacturing of chemical products; instead, it focuses on capital operations and industrial investment strategy. As the primary investment vehicle for the Yisheng industrial cluster, Dalian Yisheng Investment holds a controlling interest in Yisheng Dahua Petrochemical and maintains equity stakes in other core production enterprises, such as Hainan Yisheng Petrochemical. It connects major coastal production bases in Dalian and Hainan, overseeing the integration of industrial resources among shareholders, project capital increases, and long-term capital planning. Furthermore, it drives capacity expansion and cross-regional synergy for the Yisheng PTA and PET polyester segments. Leveraging the extensive industrial expertise of its shareholders in the petrochemical sector, the company plays a pivotal role in project initiation, capital procurement, and risk management. It coordinates strategic planning across production sites, bridges the petrochemical industrial footprint between northern and southern coastal regions, and provides essential capital-level support to the production enterprises within the Yisheng ecosystem.

Established in May 2011 and registered in the Ningbo Meishan Bonded Port Area with a registered capital of 20 million RMB, Ningbo Hengyi Trading Co., Ltd. is indirectly controlled by Hengyi Petrochemical. It serves as the core domestic and international trading platform for the Yisheng Petrochemical industrial cluster. The company holds a license for the operation of hazardous chemicals, enabling it to engage in the trading of such substances. Its primary business involves the sale of bulk chemical raw materials—including PTA, PET resin, synthetic fibers, advanced membrane materials, and petroleum products—encompassing domestic distribution, the import and export of goods and technologies (both on its own account and as an agent), as well as supporting warehousing, logistics, and technical services for the chemical industry. The company provides comprehensive support to production facilities within the Yisheng system, including Hainan Yisheng, Zhejiang Yisheng, Yisheng Dahua, and Yisheng New Materials. It coordinates the procurement of upstream raw materials (such as PX) and manages the domestic sales and overseas exports of downstream products, effectively bridging the gap between production sites and global customers. Leveraging the strategic location of the Ningbo Meishan Bonded Port Area and the Beilun Port, the company streamlines cross-border customs clearance and ocean freight booking, facilitating the export of PET bottle-grade chips and PTA to markets in Asia, Europe, and the Americas. Furthermore, the company participates in capital-related activities—such as capital increases for enterprises within the Yisheng group—and engages in market analysis and hedging to manage commodity-related risks. In doing so, it provides a stable foundation for trade, logistics, and supply chain operations across the entire Yisheng manufacturing sector.

Hengyi Petrochemical Co., Ltd. is a leading large-scale petrochemical enterprise listed on the Shenzhen Stock Exchange and serves as the core publicly traded operating platform for the Zhejiang Hengyi Group. The company adheres to a core strategy centered on the integration of oil refining and synthetic fiber production—encapsulated by the concept of "one drop of oil, two types of fiber"—and has established a comprehensive, integrated industrial chain spanning "oil refining – PTA – polyester – nylon." It has built a unique, dual-pillar business model driven by both polyester and nylon. The company operates a multi-million-tonne overseas refining and chemical complex in Brunei. Domestically, it holds interests in or controls PTA production capacity totaling 21.5 million tonnes, alongside a polymerization capacity exceeding 14 million tonnes. Its product portfolio includes PTA, PET bottle-grade chips (including recycled PET/rPET), caprolactam, nylon chips, and polyester filament, with products sold to over 80 countries and regions worldwide. Through its equity stakes in and control over the "Yisheng" series of PTA and PET production enterprises, Hengyi Petrochemical channels paraxylene (PX)—a key aromatic feedstock produced at its Brunei refinery—to its domestic polyester raw material plants. This integration creates synergy across the upstream and downstream segments, significantly reducing raw material costs. Hengyi Petrochemical is actively expanding into recycled polyester and the R&D of functional new materials, while increasing investment in green, low-carbon technologies to drive a transition toward a lower carbon footprint. With robust capabilities in R&D, manufacturing, and global trade, the company has also implemented a digital management system. It maintains strict oversight of production safety and environmental emissions, continuously optimizes its product mix, and increases the proportion of high-value-added new materials. As such, it stands as a benchmark among China’s private, integrated petrochemical companies.

Founded in 1974 and formally established as a group in 1994, Zhejiang Hengyi Group is a large-scale, multinational private petrochemical conglomerate headquartered in Hangzhou, Zhejiang Province. It has been consistently ranked among the *Fortune* Global 500 for several consecutive years. The Group’s publicly listed subsidiary, Hengyi Petrochemical, operates in partnership with Rongsheng Group to develop the Yisheng PTA/PET industrial cluster. Its business portfolio spans petroleum refining, PTA, polyester chemical fibers, petrochemical trading, modern logistics, industrial finance, and the research and development of new materials. A flagship initiative of the Group is the Hengyi Brunei Refining and Petrochemical Project—a key undertaking under the national "Belt and Road Initiative" and the largest foreign investment project in Brunei’s history. The first phase, which has an annual crude oil processing capacity of 8 million tons, integrates the entire value chain from crude oil to finished chemical fiber products; the second phase is currently under construction. The Group operates a national-level enterprise technology center and a post-doctoral research workstation, holds hundreds of authorized patents, and maintains continuous investment in the R&D of new materials and low-carbon processes. Committed to sustainable development, the Group actively fulfills its social responsibilities—ranging from ensuring safe production and promoting energy conservation and emission reduction to supporting rural revitalization and educational initiatives. Its products are widely used in sectors such as textiles and apparel, food packaging, films, and engineering plastics. With a global business footprint, Hengyi Group stands as a representative enterprise for the internationalization of China’s private petrochemical industry.

April 28, 2025, was a day of great honor for Hainan Yisheng Petrochemical Co., Ltd. Gu Changqing, a welder and maintenance team leader, and Sun Dan, the company’s labor union chairperson—recognized respectively as a 2025 National Model Worker and a recipient of the National Labor Union System Model Worker award—traveled to Beijing to attend a grand ceremony at the Great Hall of the People. The event commemorated the 100th anniversary of the All-China Federation of Trade Unions and honored outstanding national model workers and advanced workers. On that day, the Great Hall of the People was filled with a solemn yet vibrant atmosphere, as Party and state leaders gathered alongside elite representatives from across the country and various industries. General Secretary Xi Jinping attended the event and delivered an important speech, in which he highly praised the glorious journey and great achievements of the Chinese labor movement under the leadership of the Communist Party over the past century. He fully affirmed the significant contributions made by national model workers and advanced workers, and expressed earnest expectations for the working class and the broader laboring masses in the new era. Gu Changqing, a welder and maintenance team leader, has spent many years working on the front lines. Through his exceptional technical skills and extensive experience, he has repeatedly overcome complex equipment maintenance challenges, ensuring the smooth operation of production. His actions embody the "craftsman spirit." Being named a 2025 National Model Worker serves as an inspiration for him to continue making significant contributions, cementing his role as a pillar of the company’s technical team. Sun Dan, in her capacity as the company’s labor union chairperson, has long been dedicated to safeguarding the rights and interests of employees and fostering team cohesion. She has built a robust bridge for communication between the staff and the company, and has actively organized various skills training programs and cultural and sports activities, creating an environment conducive to the professional growth and success of the workforce. She is truly regarded by employees as a trusted advocate and a supportive "family member." Her recognition as a National Labor Union System Model Worker in 2023 stands as a fitting tribute to her years of steadfast dedication and selfless service. Additionally, on April 27, a commendation conference for advanced collectives, model workers, and advanced workers within the national industrial and information technology system was held in Beijing, where our colleague Zhao Xinguo was honored as a National Model Worker for the industrial and information technology sector.  Taking this recognition as an opportunity, the company will vigorously promote the spirit of model workers, the spirit of labor, and the spirit of craftsmanship. We will inspire all employees to emulate these exemplary standards—striving, innovating, and creating within their respective roles—to contribute further to the company’s high-quality development and the advancement of the industry. Through concrete actions, we will respond to the call of General Secretary Xi Jinping, writing a brand-new chapter for Hainan Yisheng Petrochemical as we embark on a new journey in this new era.