Su Xun, an essayist in the Northern Song Dynasty, and his sons Su Shi and Su Zhe. The "Three Sus" are eight masters in Tang and Song Dynasties, namely Han Yu and Liu Zongyuan in Tang Dynasty and Ouyang Xiu, Su Xun, Su Shi, Su Zhe (Su Xun is Su Shi's father and Su Shi is Su Zhe's brother), Wang Anshi and Ceng Gong in Song Dynasty. Three of them (divided into two in Tang Dynasty and six in Song Dynasty).
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