<p>The reasons the Zhangs weren't DQed in pairs was because the referree approved their interruption in the program. When you stop a program part way through, the referree can either approve or deny the chance to start again Because her safety was at risk, they had a compelling reason to stop, so the referree approved it (the same thing happened with Johnny Weir three or four years ago at US Nationals, though he eventually chose to give up). They actually couldn't start right from where they stopped -- they started where the music stopped.</p>