The image is a close-up of a blue and white sign with Chinese characters on it. The sign is rectangular in shape and has the number 81 written in white capital letters. The numbers are written in a traditional Chinese font and are arranged in a grid-like pattern. The background of the sign is a dark blue color, and it appears to be old and weathered, with peeling paint and chipped paint. The door itself is made of wood, and there is a small hole in the center of the blue sign.