Beihai Park in winter, the melody of "the sea reflects the beautiful white tower" in childhood is the best portrayal of this park. Beihai Park was once one of the royal gardens. The white tower in the song refers to the white tower temple on Qionghua Island, a royally built lama temple. The main scenic spot of Beihai Park is Beihai Lake. When winter comes, Beihai Lake is almost frozen, only a piece close to the back door is left. In order to give the lizard and green duck to roost, live water is introduced without freezing. Although winter is very cold, the beauty of the ice and the sunset are still people to browse. I believe that Beihai Park in summer must have another beauty when there are lotus flowers.