- YUNG HUA RUBBER INDUSTRIAL CO LTD
- Main business:
- Caribbean RegionBermuda
- Shanghai Zhongxing Steel Pipe Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Hunan New Material Industry Group Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Beijing Hengzhixinda Trade Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Bazhou City Quangen Metal Product Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Shanxi Guolian Pipe Industry Group Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Shandong Zhongli Steel Pipe Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Tianjin Lianda Group Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Zhangjiagang Renaissance High-Precision Steel Tube Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Shanghai Jiayi Cold-Formed Section Steel Factory
- Main business:
- Caribbean RegionBermuda
- Changzhou Wujin Shunda Precise Steel Tube Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Anshan Hongchuan Special Steel Tube Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Hebei Zewo Steel Pipe Manufacturing Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Tianjin Zhongshun Petroleum Steel Pipe Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Henkel (Tianjin) Steel Pipe Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Nantong Incent Tube Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Shandong Jianlong Iron And Steel Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Shandong Zhong Ye Petroleum Machinery Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Hunan Bestar Steel Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Tianjin Fu Shun Tong Steel Tube Co., Ltd.
- Main business:
- Caribbean RegionBermuda