Xu Gan (Chinese: 徐幹, pinyinXú Gàn, 171 – March or April 218?^[1]),courtesy nameWeichang (偉長), was a Chinese philosopher and poet of the lateEastern Han dynasty. He was also one of the "Seven Scholars of Jian'an". He is best known in the West for his discourse on the relationship between the names and actualities, preserved in his treatiseZhonglun (中論), or "Balanced Discourses".

Born in Ju County,Beihai Commandery (east of present-dayLechang,Shandong), Xu Gan developed a reputation for good memory and diligent studies as a youth. Around 189, Xu Gan left his residence inLinzi and went into hiding on theJiaodong peninsula.

Although living in tumultuous times, and seeking at causes of decline, his work's introduction, written from the viewpoint of a reverent disciple, suggests his exile more self-imposed for the sake of Confucianist study than any outcast status, even if some his politics might have been at variance. He seems to have been familiar with the "Legalists", but is not that unusual for his time and advocated that reward and punishment should be consistent rather than extreme, fitting alongside his other "Balanced Discourses."

It has been suggested that his writing were directed atCao Cao. After participating in Cao Cao's campaigns, theRecords of the Three Kingdoms state that he was appointed magistrate ofShanghai, but did not serve. He did serve as Minister of Works, from 197-208, and literary advisor until 211.^[2]

• John Makeham,Name and Actuality in Early Chinese History. State University of New York Press, Albany, 1994.

• Balanced Discourses: a Bilingual Edition. English translation by John Makeham; Introductions by Dan Shengyuan and John Makeham. Yale University Press, 2002.

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