Hang a chair and squat, keep sitting upright, exhale, stretch your spine as much as possible, make your body taller, and keep it for a few seconds; After that, the body leans forward slightly and opens its arms in a V-shape, as if lifting a cabin above its head. Move your eyes. When you are tired, look at a reference object outside the window, try to keep your eyes still for one minute, then close your eyes, blink continuously at a constant speed, or turn your eyes left and right. This can eliminate eye fatigue.