Cortrong PC sunshine board (hollow board) is made of polycarbonate raw materials and co extrusion of UV with high concentration. When the impact force is hit by 21m/s hail, there is no crack. It has the characteristics of light weight, light transmission, impact resistance, heat isolation, flame retardant and durability. Besides the above characteristics, the crystal bright sunshine board has the effect of "crystal clear and bright", which makes the light penetrate more soft and has better aesthetic visual effect.