A few years after the Anshi Rebellion, the Tubo army invaded the southwest. Gao Shi, the governor of the Tang Dynasty, was at a disadvantage in the battle, and Chang'an was in danger. Gao Shi, who was trapped in the isolated city, recalled his life experience with Li Bai to the eunuch who was overseeing the army.In Gao Shi's memories, he returned to Liangyuan three times, visited the Yellow Crane Tower three times, entered Chang'an three times, and visited Yangzhou twice. Each time he went and left, he witnessed Li Bai, Du Fu, Li Guinian, Ge Shuhan, etc.The turning points in the lives of the sages of the Tang Dynasty, as well as the historical events of the Tang Dynasty from prosperity to decline, such as the Battle of Tongguan and the Anshi Rebellion.