 Master Duen had long been a protector of the walled city; his Bajiquan kwoon was established to defend the walled city against oncoming triads, who were trying to take the ungoverned walled city as their base.Wanting to protect the walled city with them, Yeung asked his father to teach him his signature move, "Scaling Tiger" (猛虎硬爬山), but his father said the move was too powerful for someone as young as Yeung to learn.Yeung was forcibly separated from his family when Master Duen died under mysterious circumstances.