《资治通鉴·齐纪·齐纪四》
我们国家是在北方疆土上建立起来的，后来又迁都到平城。但是，平城只是用武力开疆拓土的地方，而不宜进行治理教化。
但国家兴自朔土，徙居平城；此乃用武之地，非可文治。
Our country was established in the northern territory, and later the capital was moved to Pingcheng. However, Pingcheng is only a place to conquer territory by force, and it is not suitable for governing and educating.