Zhuang Zhou, commonly known as Zhuangzi (Chinese: 莊子; literally "Master Zhuang"; also rendered as Chuang Tzu), was an influential Chinese philosopher who lived around the 4th century BC during the Warring States period, a period corresponding to the summit of Chinese philosophy, the Hundred Schools of Thought. He is credited with writing—in part or in whole—a work known by his name, the Zhuangzi, which is one of the foundational texts of Taoism.
Source: Zhuang Zhou on Wikipedia.