Poems expressing turning points in ancient Chinese.

Hello, I want to ask which poem in ancient Chinese stands for transition? The poem representing leap in ancient Chinese is: the pavilion overlooks the heart of the blue waves, watching the leap in me. This poem comes from "Eight Scenes of Xingyuan Six Waterside Pavilions of West Lake" written by Hu Bingwen in Song Dynasty, in which the sentence "Look at me and leap" means leap.