The image is a photograph of a blue signboard on a concrete wall. The signboard is rectangular in shape and has Chinese characters written on it in white. The text on the signboard reads "Rear Station 20" and "Stock 20". There is an arrow pointing to the right, indicating the direction of the rear station. On the right side of the image, there is a red and white signboard with Chinese characters. The wall appears to be old and weathered, with some cracks and peeling paint.