Catch no ball. If PMD to DBG got fault, obviously DBG to PMD no
fault what. 
+ 1, furthermore, based on distance, the amount of trains left
in DBG is limited.
Unless, it means, it can overtake or some "hidden crossovers"
actually existed which bypasses the track fault sector.
But, I still think that this poster had read the report wrongly
OR the report contains major factual error. Mind showing us the
link (I Chinese, so as many others as well, so translation is not
an issue)