草书张丞相好草圣而不工,流辈皆讥笑之,丞相自若也。一日,得句,索笔绝书,满纸龙蛇飞动。使其侄录之,当波险处,侄罔然而止,执所书问曰:『此何字?』丞相熟视久之,亦自不识,诟其侄曰:『胡不早问,致我忘之?』(宋·邢居实《拊掌录》) The cursive Zhang Yixiang is a good grass saint and has no work. One day, the sentence must be determined, and the paper dragon snake must fly. To make it recorded, when the Department of Risk Management stopped short, the book of the Executive Office asked: “Why is this word?” When he was relied on for a long time, he never knew, and he said: "Hu didn’t ask early. I forgot?”(Song Xing Xing’s “Zhi Zhang”)