Statue of Zengzi (right) and his mother.

Zengzi (Tsang) (Chinese: 曾子; pinyin: Zēngzǐ; Wade-Giles: Tsengtzu, 505–436 BC), born Zeng Shen (曾參), courtesy name Ziyu (子輿), was a Chinese philosopher and student of Confucius.

He is credited with authorship of a large portion of the Great Learning, including its foreword. Zengzi's disciples are believed to have been among the most important compilers of the Analects of Confucius and other Confucian classics. Zengzi was also an early Chinese proponent of a round earth theory, as opposed to a flat earth model (refer to the article for more detail).

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