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.