There are 4450 reflector elements in total, each of which is aluminum structure. Each triangular element is ~11 meters long and holds an area of ~50 square meters. The total structure is made of back structure (spatial truss) and slightly concaved panel, with its 3 vertices connected with and constrained to the relevant node disks of the cable-net. All panels are perforated up to 50% and the surface accuracy is better than 2mm. When the cable-net deforms actively to change its shape, it also pushes forward the mounted 1000 elements to form paraboloid as demanded by observation.