《宋史·列传·卷一百一十七》
是说皇上的车驾必须到京城去一下，拜祭拜祭宗庙，安慰安慰都城的人心，考虑到京城不能居住，所以只作为巡幸打算。
谓车驾不可不一到京师，见宗庙，以慰都人之心，度未可居，则为巡幸之计。
It means that the emperor's car must go to the capital to worship the ancestral temple and comfort the people's hearts in the capital. Considering that the capital cannot be inhabited, it is only intended to be a tour.