You Yi'er of the Tang Dynasty

Youyi was an intelligence command system set up at the beginning of the Tang Dynasty on the borders and in vassal towns for patrolling, reconnaissance, capture, etc. It was similar to a scout. You Yishi is the commander of the intelligence unit and is directly subordinate to the Jiedushi or the military town envoy. This story tells the story of Li Zhenxi, the Youyier of the Anxi Protectorate of the Tang Dynasty, who grew up in the struggle against Tuqishi, Tubo and others during the Kaiyuan period.