《资治通鉴·陈纪·陈纪一》
北齐文宣帝问特进彭城公元韶说： 汉朝光武皇帝为什么能实现中兴大业呢？ 
齐主问于特进彭城公元韶曰： 汉光武何故中兴？ 
Emperor Wenxuan of Northern Qi asked Special Aide to the Emperor Pengcheng King Yuan Shao: why was Emperor Guangwu of Han able to achieve such a great restoration?