Are you A2D or, addicted to those fast-paced, gut-wrenching vertical dramas? Started in China, now these micro dramas for the US market are no longer simply canned in China but increasingly churned out on the US soil to meet the insatiable appetite for the vertical generation. Julian Waghann talks to American actor Matt William Knowles whose career has straddled not only both China and the US but also the horizontal and vertical screens.