The aspects and change during the government service of displaced people of Goguryeo in Zhechongbu(折衝府)

The displaced people of Goguryeo were assigned mainly to Zhechongbu(折衝府) of Jingzhaofu(京兆府) in Xian during the reign of Emperor Gaozong of Tang. Many of them administered the palace guards who came up to Xian from the local corps. Tang Dynasty assigned duties of management of the palace guards to Goguryeo people while putting them into the government office. Later, Goguryeo people were dispatched mainly to Zhechongbu rather than Jingzhaofu. Zhechongbu was strategically important as a traffic route from Xian to Luoyang, eastern capital, while defending the two capital cities. In addition, the displaced people of Goguryeo were in charge of managing general infrastructures. Each reginal Zhechongbu mainly takes charge of training the military ranks while dealing with various local specific issues. For example, they strengthened the national defense against possible aggression in the area of rampart while guarding and maintaining the imperial tombs, detached palaces, storage facilities, etc. They guarded emperors when the emperor visited the detached palace as well.