1 Shandong Laigang Construction Co., Ltd.
Yangtze River Precision Work Steel Structure (Group) Co., Ltd.
Zhejiang Hangxiao Company Limited
4 Jiangsu Tian Steel Structure Engineering Group Co., Ltd.
5 Panyu Guangsha New Building Materials Co., Ltd.
6 Jiangsu Changhong Steel Structure Engineering Co., Ltd.
7 Hangzhou Dida Grid Manufacturing Co., Ltd.
8 Shanghai Mei Jian Steel Structure Co., Ltd.
9 Dongguan Zhongsai Steel Structure Engineering Co., Ltd.
10 Shanghai COSCO Kawasaki Heavy Industry Steel Structure Co., Ltd.
1 1 Nielsen factory welding (Tianjin) co., ltd.
12 Shanghai Jinma High Strength Fastener Co., Ltd.
13 China Construction No.1 Engineering Co., Ltd.
14 Anhui Huang Fu Steel Structure Co., Ltd.
15 Shandong Jingdian Construction Engineering Co., Ltd.
16 Xiamen minchuan steel structure engineering co., ltd
17 Zhejiang seiko steel structure co., ltd
18 Yunnan huabang steel structure engineering co., ltd
19 Shandong Wan Sida group co., ltd.
20 Hunan Jinhai Steel Structure Engineering Co., Ltd.
2 1 Wenzhou Chengneng Steel Structure Engineering Co., Ltd.
22. China Xinxing Construction and Development Corporation Steel Structure Engineering Company
23 Tianjin Wan Licheng Industrial Development Co., Ltd.
Shanghai Ling Tao steel structure co., ltd
25 Hebei Jin Huan Steel Structure Engineering Co., Ltd.
26. Matailik (Qingdao) Building System Co., Ltd.
27 Tianjin Wanlite Construction Steel Co., Ltd.
28 Shandong Zhongtong Steel Structure Construction Co., Ltd.
29 Henan Tianfeng Group
30 Shanghai General Metal Structure Engineering Co., Ltd.