" Dew is thick, flowers are thin, sweat is light, clothes are transparent " was a poem describing the summer scene from the Tang Dynasty poet Du Fu's poem " Climbing High." Among them,"Dew is thick and flowers are thin" described that the flowers look very thin in the summer dew, while "thin sweat and light clothes" described that the summer temperature is lower and people only have thin sweat but their clothes are already soaked. This poem has always been praised by the world. On the one hand, it described the scene of a hot summer and made people feel the cruelty of nature and the fragility of life. On the other hand, it also expressed the survival of human beings in the natural environment through images such as "dew is thick and flowers are thin" and "thin sweat is light and clothes are transparent", emphasizing the relationship between man and nature. This poem also had a certain cultural meaning. The scenes of "dew thick flowers thin","thin sweat light clothes" and other scenes were related to ancient summer sports-swimming. When swimming, the body had to withstand a large amount of water pressure, so there would be a situation of "thin sweat light clothes", which also showed that summer swimming was a popular sport.