As a member of the first generation of the legendary Three Great Heavens of Zhao, Chou Sha was considered one of the most famous generals of his era. Before his death, he was considered an equal to other legendary figures of this time like Six Great Generals of Qin and the Gaku Ki of Yan.
He is based on a real historical general and bureaucrat Zhao She.
According to history, Zhao She is the father of Zhao Kuo, who is Chou Katsu. This was not depicted in the manga though.
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