I'd guess that means that us 15ths will go into preparing to ship over the 28th night/29th morning Eastern time, which would be mid-day on the 29th Chinese time. It'd ship out that evening Chinese time on FDX28, or the morning of the 29th Eastern time, arrive in Anchorage that afternoon, and then Memphis the morning of the 30th.
That sounds a bit optimistic to me. I think there's still a lot left for them to do before they start moving on to most of the 15ths (sure, maybe they'll prepare one or two, but not many).
I ordered on the 14th and it's still processing.
BTO base model with 16GB RAM, if you're curious.