《战国策·齐六·燕攻齐取七十余城》
而且楚国进攻南阳、魏国进逼平陆，齐国压根就没有分兵拒击的意思，认为失去南阳之害，不及攻取聊城之利，所以一心一意攻打聊城。
且楚攻南阳，魏攻平陆，齐无南面之心，以为亡南阳之害，不若得济北之利，故定计而坚守之。
Moreover, the state of Chu attacked Nanyang, and the state of Wei approached Pinglu, the state of Qi had no intention of sending troops to resist, they thought that the harm of losing Nanyang was not as great as the benefit of capturing Liaocheng, so they concentrated on attacking Liaocheng.