Zheng He of Hui Zong (1111117) decided that the rank of military attache was fifty-three, the 27th military doctor was an old official's envoy to the imperial capital, and the 28th military doctor was an old official's palace envoy and his left and right ambassadors. Thirty-one doctors replaced the old official Zhuang Zhai, Liu Zhai, and Si Wen Ambassador, thirty-one doctors replaced the old official Neiyuan, Luoyuan, Rujing, and Chongyi Ambassador, thirty-two doctors replaced the old official Xijing Ambassador, thirty-three doctors replaced the old official Xijing Square, the East and West Dyeing Institute, and the protocol ambassador, and thirty-four doctors replaced the old official ambassador.