Jiangsu Yunjoin Steel Structure Technology Co., Ltd was established in 2016, covering an area of 100 acres. It is a large-scale professional grid enterprise specialising in grid design, production, and installation for building steel structure grid projects.  The annual output of steel and grid structures is 50000 tons, with 2 advanced steel structure automation production lines and 8 advanced space frame automation production lines. All accessories, such as grid cone heads and bolt balls, have achieved independent production, research, and development. The company mainly engages in engineering supporting services for bolt ball space frame,light (heavy) steel structure, welding ball space frame, pipe truss, tensile membrane structure, etc.