The image is a diagram of a wooden structure, which appears to be a catapult or a catapult. The structure is made up of a long wooden beam with a wooden handle on one end and a wooden base on the other end. The beam is connected to a wooden pole on the right side. On the left side of the image, there is a drawing of a man and a cow pulling a cart. The man is wearing a long robe and a hat, and the cow is pulling the cart with both hands.

There are also several arrows pointing towards the beam, indicating the direction of the movement. The arrows are labeled with Chinese characters, which likely provide further information about the structure. The background is white, and there is text on the top left corner that likely provides more information about how the structure works.