《资治通鉴·隋纪·隋纪五》
炀帝没有一天不在营建宫室，两京以及江都，苑囿亭殿虽然很多，时间久了炀帝仍非常感到厌倦，每次游玩，左顾右盼，觉得这些宫殿苑林都没有中意的，不知道什么是好。
帝无日不治宫室，两京及江都，苑囿亭殿虽多，久而益厌。每游幸，左右顾瞩，无可意者，不知所适。
Emperor Yang never went a day without constructing palaces. Although there were a lot of palaces and pavilions in the two capitals and Jiang du, Emperor Yang still felt bored after a long time. Every time he went out to play, he looked around and felt that these palaces and gardens were not to his liking. He did not know what was good.