《魏书·帝纪·卷七》
十四日，孝文帝下诏说： 入朝觐见，是附属国应该遵守的规矩，赏赐给他们车马，是表示君主永恒不变的仁爱与恩惠，如今各国的国王、世子，云集大魏，竞相入朝觐见。
乙丑，诏曰： 夫骏奔入觐，臣下之常式；锡马赐车，君人之恆惠。今诸边君蕃胤，皆虔集象魏，趋锵紫庭。
On the fourteenth day, Emperor Xiaowen issued an edict saying: Visiting the imperial court is a rule that vassal states should abide by, and granting them chariots and horses is a way to show the sovereign's eternal benevolence and grace. Nowadays, kings and crown princes of various countries gather in the state of Wei, competing to visit the imperial court.