Yisheng Petrochemical is a large-scale private petrochemical enterprise jointly invested by Zhejiang Hengyi Group and Rongsheng Holding Group, established in 2010. The company's main business covers the production of purified terephthalic acid (PTA) and polyethylene terephthalate (PET) chips. Its products are widely used in beverage bottles, food packaging, medical supplies, and other fields.

Yisheng Petrochemical has multiple production bases across China, including Ningbo, Dalian, and Hainan. Hainan Yisheng Petrochemical Co., Ltd., located in Hainan Yangpu Economic Development Zone, started production in its Phase I project in 2010, and the Phase II project was completed and put into operation in December 2023. Currently, Hainan Yisheng Petrochemical has an annual production capacity of 4.6 million tons of PTA and 3.8 million tons of PET. In addition, Zhejiang Yisheng Petrochemical Co., Ltd. holds the world's largest PTA production capacity, reaching 21.9 million tons.

Yisheng Petrochemical enjoys a significant market position in the PTA industry and is known as the "world's largest PTA plant." Its products have obtained various authoritative certifications, including FDA, EU, Halal, Coca-Cola, and PepsiCo, and are highly recognized in the market. The company's products are not only supplied to the domestic market but also exported to Southeast Asia, the Middle East, North Africa, Central Asia, and other regions.

Yisheng Petrochemical is committed to independent development and technological innovation. It has developed China's first set of PTA production technology and domestic production facilities with a single-line production capacity of one million tons. The company has established a provincial-level enterprise technology center and has in-depth cooperation with institutions such as the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences and Zhejiang University. In recent years, it has obtained 38 national authorized patents, including 13 invention patents.

Relying on the policy advantages of the Hainan Free Trade Port and the geographical advantages of Yangpu Port, Yisheng Petrochemical continues to expand its production capacity and optimize its industrial chain layout. With the construction of the Yangpu Petrochemical New Materials Park, Yisheng Petrochemical will further extend its industrial chain and achieve agglomeration development.