《旧唐书·本纪·卷十七》
皇上至宣政殿考试制举人二百九十一人，以中书舍人郑涵、吏部郎中崔、兵部郎中李虞仲等充任考试制策官。
上御宣政殿试制举人二百九十一人，以中书舍人郑涵、吏部郎中崔琯、兵部郎中李虞仲并充考制策官。
The emperor examined 291 imperial examination candidates in the Xuanzheng Hall and appointed Zheng Han, a Zhongshu She Ren, Cui, a Libu Lang Zhong, and Li Yuzhong, a Bingbu Lang Zhong, as officials in charge of the examination strategy.