《资治通鉴·宋纪·宋纪十六》
可是，情况不断变化，欣赏趣味也跟着转移，以后，逐渐衰落。十几年之间，失传的将近一半，民间竞相制作新的歌曲，乱杂芜，应该命令有关部门，加以整理补充。 
而情变听移，稍复销落，十数年间，亡者将半，民间竞造新声杂曲，烦淫无极，宜命有司悉加补缀。 
However, as time changes, the appreciation of interest has shifted. Later on, there was gradual decline. In ten or more years, nearly half of them have been lost. The people have made new songs in competition. They are mixed and miscellaneous. They should be ordered to be sorted out and supplemented by the relevant departments.