The image shows a sign on the side of an escalator in a subway station. The sign is rectangular in shape and has Chinese characters written on it. The text on the sign reads "Please do not climb" in both English and Chinese. Below the text, there are four circular signs with illustrations of people in different colors - yellow, orange, red, blue, green, and black. The signs are arranged in a diagonal line, with the yellow sign on top, the orange sign in the middle, and the green sign on either side. The background of the image is blurred, but it appears to be an indoor space with a glass railing.