2. "Bold and tragic" is the remarkable feature of Gao Shi's frontier poems. His poems are quality-oriented, magnificent and simple. Lofty and lonely, he has the spirit of a ranger. He once roamed Liang and Song Dynasties and devoted himself to self-sufficiency. In addition, he is generous and upright, so his poems reflect a wide range of aspects and profound themes. Gao Shi's psychological structure is extensive, and his personality is straightforward, so his poems often express his mind directly, or talk to each other, and rarely use metaphors. Gao Shi's frontier poems praised the soldiers' heroic feelings of serving the country and making contributions, and also wrote their hardships in army life and their beautiful desire for peace. It also exposed the arrogance and extravagance of frontier fortress generals, their insensitivity to soldiers, their ignorance of rewards and punishments, and their lack of strategies to protect the country and love the people.