Shandong Fiberglass Group Co., Ltd. is a state-owned listed enterprise controlled by Shandong Energy Group, with a registered capital of 600 million yuan. Currently, it has three wholly-owned subsidiaries, Linyi Tianju Energy-Saving Materials Co., Ltd., Zibo Zhuoyi Fiberglass Materials Co., Ltd., and Yishui County Thermal Power Co., Ltd., covering two counties, Yishui and Yiyuan, four production plants, and the main business is The business is two major categories: glass fiber production and its primary processing and thermoelectric products. Currently, there are 6 glass fiber production lines with a designed production capacity of 410,000 tons/year, ranking fourth in the country.

Yishui Thermal Power undertakes 80% of residents' heating in Yishui County and the industrial steam supply of all enterprises in Chengnan Industrial Park. The total installed capacity is 158MW and the annual power generation is 570 million kwh. The actual heating area in 2021 is 5 million square meters, and the annual steam supply is 90. Ten thousand tons. Before 2008, the company used the ball crucible wire drawing process for glass fiber production, with an annual production capacity of less than 5,000 tons. In 2008, the first 30,000 tons of pond kiln wire drawing production line was built, and it was officially put into production in early 2009, opening a new era of transformation, upgrading and development.