- Tangshan Jinzhi Company Ltd
- Address:weiguo road Tangshan Hebei 066000 China
- Changzhou Keshengli Technological Development Center
- Address:No.2 Industrial Avenue,Yaoguan Changzhou Jiangsu 213102 China
- Shandong Jianxin Petroleum Equipment Company
- Address:dongzhao building city of Dongying China Dongying Shandong 257000 China