The fifth-century historian Pei Songzhi, who annotated the "Sanguozhi", disagreed with Chen Shou's point of view. He argued that Fei Yi and Jiang Wan did well during their regencies when they refrained from making risky moves that could jeopardise Shu's future and when they successfully countered a Wei invasion and maintained peace within Shu's borders. He also pointed out that readers may find Chen Shou's concluding remarks confusing because Chen Shou did not provide any evidence to support his claim that Fei Yi and Jiang Wan did not put in their best to govern Shu and keep it safe.