The purpose of the former is to suppress traitors and prevent the enemy from getting information,and of the latter to assist our own operations (by strengthening our defence works) and prevent the enemy from getting food (by clearing the fields).

• 前者为了镇压汉奸，并使敌人得不到消息；后者为了协助作战（坚壁），并使敌人得不到粮食（清野）。