Shangcheng vividly expresses the poet's optimistic attitude and lofty ambition towards nature and society through images such as the cold river, frosty days, Wanshan (the forest is full of dye), Xiangjiang (the clear water and rivers compete for water) and the flying eagle swimming fish (all kinds of frosty days compete for freedom). Xia Kun wrote about high-spirited schoolmates and teenagers, reprimanding Fang Qiu, inspiring words, pointing out the mountains and rivers, hitting the water in the middle, and riding the waves to restrain the flying boat, which showed the fighting spirit of "schoolmates and teenagers" taking the world as their responsibility, transforming the old world and creating a new world.