- Qingdao Longwantailong Trade Co., Ltd.
- 全国主营:Hardware standard part
- Beijing Deyilong Plastic-steel Door And Window Co., Ltd.
- 全国主营:Plastic-steel door and window
- Qingdao Hongfulin Door Co., Ltd.
- 全国主营:Door product
- Qingdao Zhengtaizheng Cable Bridge Frame Co., Ltd.
- 全国主营:Cable bridge frame, Metal raceway, Bus duct
- Guangdong Xueqin Electrical Appliance Trading Co., Ltd.
- 全国主营:Electronic products, Electrical appliance
- Dongguan Jinquan Spring Co., Ltd.
- 全国主营:Spring.
- Shantou Wuzhou Steel Tool Co., Ltd.
- 全国主营:Lock, Office appliance, Burglarproof door, Brake door, Packing product.
- Ju Xian Hongning Iron Art Product Co., Ltd.
- 全国主营:Iron art gate, Fence, Iron art furniture.
- Qingdao Xingtai Intelligent Door Industry Co., Ltd.
- 全国主营:Security door, Bipartition door, Building electronic communication door, Stainless steel door
- Lanzhou Haihong Communication Equipment Co., Ltd.
- 全国主营:Communication equipment
- Shenzhen Borui'an Technology Co., Ltd.
- 全国主营:Safety protection product
- Qingdao Dedian Door And Window Engineering Co., Ltd.
- 全国主营:Door and window
- Guangdong Bangda Pipeline Fittings Co., Ltd.
- 全国主营:Groove type pipe fittings
- Qingdao Runyang Ship Fittings Co., Ltd.
- 全国主营:Ship fittings
- Shantou Dunxin Electrical Appliance Co., Ltd.
- 全国主营:Heating and plumbing pipe fittings, Electronic inductive products
- Qijiang Hoisting Machine Co., Ltd.
- 全国主营:Hoisting machine
- Qixin Electromechanical Engineering (shenzhen) Co., Ltd.
- 全国主营:Electromechanical engineering equipment
- Hebei Ruite Pipe Fittings Co., Ltd.
- 全国主营:Pipe fittings
- Hebei Longyao Tangyaojian Nail Co., Ltd.
- 全国主营:Nail
- Hebei Hengxin High-pressure Pipe Fittings Co., Ltd.
- 全国主营:Pipe fittings