2. Drunk preface refers to Zhang Xu, a cursive writer in Tang Dynasty. Because of its good wine, it is called.
3. Dian Xu [diānxù] Zhang Xu, a calligrapher in the Tang Dynasty, was a heavy drinker. Every time he gets drunk, he writes a pen or a book with ink. When he woke up, he thought he was a god, and the world called him Zhang Dian. See the new Tang book. Literary biography. Zhang Xu. Later, it was called Zhang Xu by Canon Xu.