The green of Shanglin Lake was a famous scene in " Battle Through the Sky ", which depicted the beautiful scenery of Shanglin Lake and the importance of ecological balance. Shanglin Lake was a mysterious lake that Xiao Yan had accidentally discovered during his training. There were dense forests, flowers, and trees around the lake. Hence, the color of Shanglin Lake was described as green and extremely beautiful. In the novel, Shanglin Lake was also an important training place. Xiao Yan had obtained many training resources and opportunities here. One of the characteristics of Shanglin Lake was its ecological balance. The novel described that there were many plants and animals around Shanglin Lake. They depended on each other and restricted each other to form an ecological balance. This also reflected the idea of harmony between man and nature emphasized in the novel. The green of Shanglin Lake was a fascinating scene in " Battle Through the Heavens ", which showed the importance and concern of nature and ecology in the novel.