《南齐书·列传·卷五十一》
张欣泰说： 敌虏筑城的原因，是对外显示强大，实际上是害怕我军偷偷地行进到他们的后面去。
欣泰曰： 虏所以筑城者，外示姱大，实惧我蹑其后耳。
Zhang Xintai said: The reason why the enemy built the city was to show their strength to the outside world, but in fact they were afraid that our army would secretly advance to their rear.