歷代三寶紀 3.187

3.187

（乙亥）延熙元　　　十九（大赦制衣冠章服定四海立門弟頒律令正言音改拓拔為元姓修禮樂）

(Yihai), Jianwu, year 1; Northern Wei: [Taihe], year 19 (a general amnesty was proclaimed; headwear, robes, regulations, and court dress were instituted; the four seas were stabilized; family ranks were established; laws and decrees were promulgated; correct pronunciation was rectified; the surname Tuoba was changed to Yuan; rites and music were cultivated).