《北史·本记·卷十一》
十二月初三，下诏东宫的官员对皇太子不得称臣。
十二月戊午，诏东宫官属于皇太子不得称臣。
On the 3rd of the 12th month, an imperial edict was issued, forbidding the officials of the Eastern Palace from addressing the Crown Prince as a subject.