Rethinking of the Relationship between Guiyi Jun (归义军) and the Tang Central Government during Zhang Yichao Period
In the second month of the fifth years of Dazhong( 大中),the first Shazhou mission( 沙州使团) arrived at Chang'an( 长安). Wuzhen( 悟真) was the head of the mission,Gao Jinda( 高进达) was just an ordinary member of the mission. Due to Xuanzong( 宣 宗) 's lack of will to administrate the lost land of He Long( 河陇),Guiyi Jun and the Tang government maintained a comparatively harmonious relationship during Dazhong period. Following Xuanzong's death and Yizong( 懿宗) 's succession,the recovery of Liangzhou( 凉州),the Tang government began to weaken Guiyi Jun's power,by setting up Jiedu( 节度),partitioning Guiyi Jun's administrative land,so the relationship deteriorated during the Xiantong( 咸 通) period. Zhang Yichao presenting himself at Tang court in the eighth year of Xiantong period had no direct relation with his brother Zhang Yitan's death of disease in Chang'an,but was the result of Tang's managing policy in He Long region.