Hainan Yijing Environmental Protection Co., Ltd., abbreviated as "Yijing Environmental Protection" (stock code: 839080), was established in 1986.

The company specializes in the chemical treatment of tap water, municipal sewage, and industrial sewage, integrating research and development, production, sales, and service. Provide customers with cost-effective comprehensive solutions for water treatment chemicals. The annual production and sales of various water treatment chemicals exceed 600000 tons, with an annual sales revenue of 500 million yuan in 2021.

The group has four wholly-owned subsidiaries, namely Jiangsu Yijing Water Treatment Chemicals Co., Ltd., Xuzhou Meiliyuan Environmental Protection Technology Co., Ltd., Guangzhou Yijing Water Treatment Chemicals Co., Ltd., and Hainan Yijing Environmental Protection Technology Co., Ltd. The group has water treatment chemical storage bases in Nantong, Fujian, Fuzhou, Fujian, Quanzhou, Guangxi, and other places, providing customers with comprehensive solutions, cost-effective chemicals, and third-party warehousing, and self provided logistics transportation support and TMS transportation management system.