《新唐书·列传·卷一百一十三》
唐僖宗在蜀地时，刺史派他到皇帝驻地送奏章，他每天跑三百里路，按期回来了。
僖宗在蜀，刺史遣通章行在，日走三百里，如约而还。
When Emperor Xizong of Tang was in Shu, the magistrate sent him to the emperor's residence to deliver the memorial. He ran three hundred miles a day and returned on time.