The image is a framed poster with a beige background and black borders. The poster is titled "The Invention of Postmark" and has a title at the top that reads "25 years of the invention of postmark". Below the title, there is a list of various stamps and symbols arranged in a grid-like pattern. The stamps are of different shapes, sizes, and colors, including circles, squares, and rectangles. Some of the stamps have images of people, animals, and other objects, while others have text written in Chinese characters. At the bottom of the poster, there are two lines of text that appear to be instructions or information about the invention.