Beigang Group Limited Company Zhang Qingyu Metallurgical Institute; China First Heavy Industries Qu Zaiwen Liu Ying No 6 Stevedoring Company of Qinhuangdao Port Authority Hu Bo;

• 北钢集团有限责任公司;一重集团公司冶金研究所;秦皇岛港务局第六港务公司;