《资治通鉴·唐纪·唐纪六十三》
起昭阳大渊献，尽阏逢困敦七月，凡一年有奇。
起昭阳大渊献，尽阏逢困敦七月，凡一年有奇。
The expedition extended from the presentation of the Grand Abyss of Zhaoyang to the end of the period of Yufeng Kundun in July, and thus lasted for just over a year.