The image is a photograph of a sign in a museum. The sign is rectangular in shape and has Chinese characters written on it. The text on the sign reads "Middle-ranking Officer" in both English and Chinese characters. Below the text, there is a description of the officer's uniform, which includes a double-layered flat hat and square-toed shoes. The officer also mentions that the armor for the middle-ranking officers has two different styles: one with chest armor only and another with both chest and back armor. The background of the image shows a person's legs and feet, suggesting that the photo was taken in a public space.