Zhang Zhilei made history in April when he secured the WBO interim heavyweight title, defeating hometown favorite Joe Joyce. But for the Chinese boxing maverick nicknamed “Big Bang,” the more than 20-year journey to fame and success has been one of hard work, dedication, and considerable personal sacrifice.

Video editor: Wu Jiaying, Lü Xiao; Intern: He Jiaqi, Zuo Yuyao; Colorist: Jiang Yong; Copy editor: Vincent Chow.