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Chuang Tzu, also known as Zhuangzi, was a renowned Chinese philosopher and writer during the Warring States period. His name is often written as "Zhuangzi" in pinyin, the standard romanization system for Mandarin Chinese, while "Chuang Tzu" is the Wade-Giles romanization, which was once widely used but is now less common. Both names refer to the same historical figure, a prominent representative of the Taoist school of thought.