《文心雕龙·乐府》
到三国时魏的曹操、曹丕、曹睿，他们的气质高朗，才华美妙，用古题乐府写时事，音节也美妙而和平。
至于魏之三祖，气爽才丽，宰割辞调，音靡节平。
In the Three Kingdoms period, Cao Cao, Cao Pi, and Cao Rui were all open-minded and talented. They wrote current events using the ancient Yuelu poems, and the rhythm was also beautiful and peaceful.