《百战奇略·第五卷·奇战》
这样作战就能够胜利。诚如兵法所说： 发现敌人有虚弱之点，我就一定采取出奇制胜战法袭击它。 
法曰： 敌虚，则我必为奇。 
Success is assured if this strategy is implemented. According to military strategy, ‘If the enemy’s defences appear weak, then an unorthodox attack should be made to defeat him’.