Zhuangzi's point of view is that swimming fish is happy, while Keiko's point of view is that "you are not a fish, and you don't know the fun of fish", failing to realize that people have the ability to think and can understand and transform the world. Zhuangzi's viewpoint is actually the projection and reflection of his happy mood, and it also embodies Zhuangzi's thought of advocating "nature" and opposing "man-made". Zhuangzi and Keiko Traveling on Haoliang is an argumentative essay in Zhuangzi Qiushui during the Warring States Period, which tells a little argument between Zhuangzi and Keiko when they were playing on Haoshui Bridge.