The Three Point Break Rule (On the break shot, a minimum of three object balls must either be pocketed, or touch the head string line, or a combination of both.)
Why does the referry have to stand right behind a player ( @ 11:40 minute mark, the player was Ms Liu Sha Sha? Is he afraid the lady will fall down by the sheer strain of standing for a 1+ hours' match? Hey, learn to move, at least out of the view of the Video cameras!!