Researchers who support this grouping pointed out that Zhao Yun's core responsibility was to ensure the safety of Shu Han's central government, and historically this role could only be assigned to the most reliable commander. It is important to raise the awareness that protecting the kingdom is the same important as expanding territory, and it is reasonable for Chen Shou to list Zhao Yun in the same volume of Guan Yu, and for people to refer both Zhao Yun and Guan Yu as members of "Five Tiger Generals".