《陈书·列传·卷十五》
仆射徐陵曾上书朝廷直言让位给张种说： 臣张种才具和胸怀深沉严密，文史知识丰富，是东南地方重要的优秀人才，朝廷亲信德才兼备之士，能实现大的事业，张种适合官居左丞相。 
仆射徐陵尝抗表让位于种曰： 臣种器怀沈密，文史优裕，东南贵秀，朝庭亲贤，克壮其猷，宜居左执。 
Shangshu Xu Ling had once presented a letter to the court stating that he should give way to Zhang Zhong and said: "My minister Zhang Zhong is talented and has a deep and strict mind, and he has a rich knowledge of literature and history. He is an important talent in the southeast. The court trusts people with both virtue and talent, and can achieve great achievements. Zhang Zhong is suitable for the post of Zuo Cheng Xiang."