《资治通鉴·汉纪·汉纪三十八》
东平王刘苍上书提出三项建议，章帝下诏答复说： 最近在官员和百姓的奏书中也有此类建议，但我见识才智浅薄，有时认为或许可行，后来又认为不可行，不知如何裁定。
东平王苍上便宜三事。帝报书曰： 间吏民奏事亦有此言，但明智浅短，或谓倘是，复虑为非，不知所定。
Liu Cang, the king of Dong Ping, wrote to make three suggestions. Emperor Zhang made a reply: There were these advice in the memorial from emperor and civilians, but I have shallow knowledge and limited wisdom, sometimes I think it is doable, sometimes I think it is not, I cannot make a judgment.