·Foshan Jinlih Stainless Steel Co., Ltd.
·Shandong Liaocheng Juxinyuan Pipes Co., Ltd.
·Tianjin Boyu Steel Pipe Co., Ltd.
·Cangzhou Rize Steel Pipe Co., Ltd. Cangzhou Rize Steel Pipe Co., Ltd.
·Shandong Zhong Ye Petroleum Machinery Co., Ltd.
·Wuxi Special Steel Material Co., Ltd. Wuxi Special Steel Material Co., Ltd.
·Liaocheng Xingrong Steel Pipe Co., Ltd.
·North Advanced Science And Technology (Tianjin) Industrial Co., Ltd. North Advanced Science And Te
·Ocean-Connect International Co., Ltd.