《北齐书·本纪·卷四》
九月壬申，下韶书赦免各伎作、屯、牧、各色服役的奴隶为平民户。
九月壬申，诏免诸伎作、屯、牧、杂色役隶之徒为白户。
In September Ren Shen, an edict was issued that pardoned the slaves of various skills, military camps, ranches, and other services and made them civilians.