Chinese name of KouYoku is Xiang Yi. I guess that's where the confusion comes from. Actual history shows Xiang Xi has just born now. [*]Xiang Yan fought Shin & beat him. [*]Xiang Liang lead rebellion against Qin. He was son of Xiang Yan. [*]Xiang Liang's brother Xiang Cho had a son named Xiang Yu. [*]Xiang Yu was also a rebel against Qin.