《太平广记·卷三十一·神仙三十一》
于是他就和要到京城奏事的人约定了到达长安的日期。他提前到了长安。
乃与奏事者克期至长安。
So he made an appointment with the people who were going to Beijing to report the matter, and the date to arrive in Chang'an. He arrived in Chang'an early.