《隋书·列传·卷三十四》
当时国家多事，袁充窥知炀帝想做什么事，就上表说天象如何如何，应当怎样怎样，用这种方法来讨炀帝欢心。
时军国多务，充候帝意欲有所为，便奏称天文见象，须有改作，以是取媚于上。
At that time, the state was troubled by many matters. Yuan Chong ascertained what Emperor Yang wanted to do and memorialized about how the celestial signs were and how things ought to be done in order to curry favor with Emperor Yang.