《资治通鉴·齐纪·齐纪八》
他们又派遣中书舍人张儒奉旨召太子前来，并且秘密地把孝文帝的死讯告知留守洛阳的于烈。
遣中书舍人张儒奉诏征太子；密以凶问告留守于烈。
They sent Zhang Ru, an official from the Secretariat, to summon the crown prince as instructed, and secretly informed Yu Lie who remained in Luoyang of Emperor Xiaowen's death.