In the late 1980s and the early 1990s, in the series the aesthetics of flora which Yang Chi-Hung himself called, he returned to the harmony of the universe to express a kind of romantic ambience which is rationality having been internalized through poetic iconography. During this period, the things and their images in Yang's paintings were more beyond the images themselves. They were rather the element of poet which had been filtered from external affairs through time. What we could see was the changes of nature and plants over time, and they were also vividly demonstrated with the directions of Yang's strokes.

Wave was made in 2015. Back than Yang Chi-Hung's aesthetics of botanic patterns had experienced more than decades and had become more sophisticated. The appearance and color in this painting still inherit his previous style, using main color of the earth and wave. But the abstract approach to the morphology of the waves and the natural environment has changed. The artist intentionally blurred the concrete images, successfully making the intensity when sky, earth, and sea come to an encounter. Both big unrestrained strokes and minute spots on the canvas bring the painting greatness and delicateness.