Lihuayi Group, Shandong Haike Chemical Group Co., Ltd., Shantoubo Petrochemical Co., Ltd., Shandong Kenli Petrochemical Group Co., Ltd.,Shandong Shida Shenghua Chemical Group Co., Ltd., Shandong Huifeng Petrochemical Group Co., Ltd., Dongying Yatong Petrochemical Co., Ltd.,Shandong Wantong Petrochemical Group Co., Ltd., Shandong Longyuan Petrochemical Co., Ltd., Shandong Shengxing Chemical Co., Ltd., Liaoning Tongyi Petrochemical Co., Ltd.,Shandong Hengyuan Petrochemical Co., Ltd.Sinochem Hongrun Petrochemical Co., Ltd., China National Petroleum Corporation Daqing Petrochemical Branch, China Petroleum and Chemical Corporation Maoming Branch