The image shows a close-up of a sign on the side of a train. The sign is rectangular in shape and has a red background with white text. The text reads "1317 Carriage No. 1317" in Chinese. Below the text, there is a blue square with the number 3-1 written in white. On the right side of the sign, there are two smaller blue squares with the letters "R3" and "3-1" written on them. The background is white and there are a few other signs on the wall behind the sign.