《新唐书·列传·卷六十四》
李泌奏请恢复旧制，德宗不肯，并问道 ：现在户口与天下太平时减少了多少？ 
泌请复之，帝未从，因问： 今户口减承平时几何？ 
Li Bi requested to restore the old system, but Dezong refused, and asked, "How much has the population and households decreased compared to when the country was peaceful?"