Billed as Taiwan’s biggest film production in a decade, ten years in the making, and unmistakably the work of the guy who made You Are the Apple of My Eye, Giddens Ko’s Kung Fu adapts his own cult novel into a maximalist martial-arts fantasy of rooftop chases, qi blasts, teenage heartbreak, and boys who suddenly think they might be heroes. Kai Ko plays Yuan-zai, a high-school nobody who helps a beaten-up drifter off the street and finds the man at his window that night, claiming to have slept five hundred years and demanding to become his master. The drifter is Huang Jun, played by Leon Dai with wounded gravity, dragging Yuan-zai into a grudge older than anyone alive. Comedy, combat, VFX, and adolescent longing hit at blockbuster scale.