《宋书·志·卷十七》
晋世祖让有关官员代行主祭，顾司空改移郊祀日期，看不出当时有什么合适的理由，这两件事不足为准。
晋世祖有司行事，顾司空之改郊月，既不见其当时之宜，此不足为准。
Emperor Shizu of the Jin Dynasty ordered the officials to officiate the sacrifices on his behalf, and Gu Sikong changed the date of the sacrificial ceremony to the outskirts of the capital. However, it is not clear what suitable reasons were given at the time, so these two incidents should not be taken as examples.