We use a special inverted triangular keel, whose clamping force and fatigue resistance have been professionally tested, and also use double hook hanging pieces. Moreover, the specific gravity of GFK material is only 1.7, which is light and strong. Our integrated hidden track is directly connected to the concrete ceiling and can bear more than 70 kilograms, avoiding the danger of the track and board falling when the patient pulls the curtain, and the entire top surface is simpler and smoother.