《颜氏家训·教子篇》
北齐有一位士大夫，曾对我说： 我有个儿子，已有十七岁，很会写奏札，我教他讲鲜卑语、弹奏琵琶，渐渐地都掌握了，凭借这些特长去服侍三公九卿，一定会被宠爱的，这也是紧要的事情。 
齐朝有一士大夫，尝谓吾曰： 我有一儿，年已十七，颇晓书疏。教其鲜卑语及弹琵琶，稍欲通解，以此伏事公卿，无不宠爱，亦要事也。 
There was a scholar of Northern Qi who once said to me: "I have a son who is already seventeen years old and is very good at writing official documents. I taught him to speak Xianbei and play the pipa, and he has gradually mastered these skills. If he uses these skills to serve the Three Dukes and Nine Ministers, he will definitely be favored. This is also an important matter."