The image is a photograph of a sign on a wall that reads "For a Safe Borderland". The sign is rectangular in shape and has a white background with black text. The text is written in a serif font and is centered on the sign. Below the text, there is a subtitle that reads, "During North Song Dynasty, Liao state was to the northeast of Song state and Xia State was not the nor-thwest Border clashes often happened. Mao Zedong proposed tactics to safe guard borderland. Military, he suggested to choose experienced generals, reduce redundant personnel, train militia and store army provisions, and diplomatically. He suggested to respect alliance treaties to safeguard one's own territories. Keep an open eye on enemy's movement and well-prepared against war. He thought the only way to keep border area in peace and safe was to garrison frontier for driving out aggressors."