According to Tang dynasty scholar Kong Yingda, The central army was the most prestigious army among Jin's three armies. Its commander "Zhongjunjiang" (中軍將) also governs the state of Jin as "Zhengqing" (正卿)----Jin's prime minister. Commander of the upper army ("Shangjunjiang", 上軍將) and commander of the lower army ("Xiajunjiang", 下軍將) did not have the access of political influence in Jin's court and were merely military staffs. Every commander ("Junjiang") of an Jin army was accompanied by a "Junzuo" (軍佐) who was the assistant of "Junjiang" (軍將). Other posts in Jin' army were: "Junsima" (軍司馬) and "Junwei" (軍尉). The two were subordinated under "Junjiang" and "Junzuo".