Xun You
Pei Songzhi, who annotated the "Sanguozhi", disagreed with Chen Shou. He believed that biographies should be categorised in the same volume on the basis of similarities. He argued that Jia Xu's biography should be in the same volume as the biographies of Cheng Yu and Guo Jia rather than in the same volume as the biographies of Xun Yu and Xun You. In Pei Songzhi's opinion, Jia Xu was more similar to the former two than to the latter two. Pei Songzhi even remarked, "The difference between the moral characters of Xun You and Jia Xu is like the difference between moonlight and candlelight. Both give off light, but they are fundamentally different." He also criticised Chen Shou for appraising Xun You and Jia Xu in the same sentence instead of appraising them separately.