《魏书·帝纪·卷七》
太和十一年春，正月初一，孝文帝下诏审定音乐典目，凡是不够典雅的，一律删除，禁止演奏。
十有一年春正月丁亥朔，诏定乐章，非雅者除之。
In the spring of the 11th year of Taihe, on the first day of the first month, Emperor Xiaowen issued an edict to review the music repertoire. All that were not elegant enough were deleted and banned from being played.