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It is argued that those who serve as generals must clearly understand the arts of surprise troopsoriginal: "qibing" (奇兵). These are unconventional forces used for flanking or unexpected maneuvers, as opposed to the "zheng" (正) or standard frontal forces. and ambush troops. The Classics state: "One who can recognize surprise and ambush can turn calamity into fortune." Whenever employing surprise troops, the "Rule of Three" is used as the standard: from a force of one thousand men, select three hundred; from a force of one million men, select three thousand. To deploy them, one must take the positions of the Host Eyeoriginal: "zhumu" (主目). In Taiyi divination, this represents the defender or the established party., the Wenchangoriginal: "wenchang" (文昌). While often associated with literature, in this context, it refers to a specific celestial coordinate or "star" used to calculate favorable positions for the commander., and the Great Killeroriginal: "dashao" (大殺). An aggressive or malevolent coordinate in military astrology used to determine where lethal force is most effective., or the positions of the Guest Eyeoriginal: "kemu" (客目). This represents the attacker or the moving party., the Initial Strikeoriginal: "shiji" (始擊). A coordinate used to determine the timing and direction of the first offensive move., and the Great Killer.