The Set Up and Abolishment of Guiyi Dudufu (归义都督府) and the Differentiation of Xi People (奚人)
Guiyi Dudufu was a Jimi Dudufu set up to settle the Xi people Led by Li Shi( 李诗) who surrender to the Tang. The surrender of Li Shi meant the differentiation of the Xi People into two branches. Those people who followed Li Shi,was settled in Liangxiang count,You Zhou prefecture,and those who didn't follow remained where they lived outside of the fortresses. The head of the late part of Xi people was Li Guiguo( 李归国). After Li Shi died,his son Li Xiancheng( 李献诚)succeeded him. Li Yanchong( 延宠),who was reported to be the son of Li Shi,became the head of the Xi people remaining outside of the fortresses. After the An Shi rebellion,Guiyi Dudufu was no longer in existence,and the descendants of its people became the core strength of Li Baochen( 李宝臣) group.