《新唐书·列传·卷一百二十一》
玄宗遣使臣召见吴筠于大同殿，谈得很高兴，下旨任命为翰林院待诏，吴筠向玄宗献《玄纲》三篇。
玄宗遣使召见大同殿，与语甚悦，敕待诏翰林，献《玄纲》三篇。
Emperor Xuanzong sent his envoy to invite Wu Yun to the Datong Temple, and they were very happy talking. An edict was issued to appoint Wu Yun the Hanlin Academy, and Wu Yun gave three of his own articles, <The Mystery Capsule>, to Emperor Xuanzong.