Mainly concentrated in Binzhou, Weifang, Dongying, Dongying has Huaxing Petrochemical Group Co., Ltd., Shida Shenghua Chemical Group, Wantong Petrochemical Group Co., Ltd., Zhenghe Group, Kenli Petrochemical Co., Ltd., Lijin Petrochemical, Shenchi Chemical Co., Ltd. and so on.
Weifang area includes Changyi Petrochemical Co., Ltd., Hongrun Petrochemical Additives Co., Ltd., Alliance Chemical Group Co., Ltd. and Haihua Group Co., Ltd.