《元史·列传·卷四十四》
凡攻占的地方，要严禁军士焚烧庐舍及滥杀人民，开其生路，争取人心。军队士气振奋起来了，一切军需用品都准备充足了，然后以轻骑进攻两淮，截断宋军粮草，使血脉断绝，各守孤城。
毋焚庐舍，毋伤人民，开其生路，以携其心，亟肄以疲，多方以误，以弊其力。兵势既振，蕴蓄既见，则以轻兵掠两淮，杜其樵采而遏其粮路，使血脉断绝，各守孤城，示不足取。
When a place is occupied, it's strictly forbidden to burn down houses and kill people randomly. Offer them a way out to win their hearts over. When the troops are in high spirits and military supplies are ready, the Two Huai should be attacked with light cavalry to cut off the Song army's food supplies and isolate them so they can only defend their isolated cities.