《容斋随笔·卷十·册礼不讲》
我们宋朝重视这种礼仪，但除了皇后、太子之外，即使是王侯公卿那样显贵，一般也是一次奏章请求免封就作罢，仪式礼节渐渐地地不讲究了，真正可惜！
唯国朝以此礼为重，自皇后、太子之外，虽王公之贵，率一章乞免即止，典礼益以不讲，良为可惜！
The Song Dynasty attached great importance to this etiquette, but apart from empresses and crown princes, even high-ranking officials such as dukes, marquises, earls, and barons would generally submit a memorial requesting to be exempted from the 封 (granting of title) just once, and the etiquette and ceremonies gradually became less elaborate. This is truly regrettable!