china post null pvg??RB724278084CN

Tracking No. Status Location Destination Date
RB724278084CN Collection Xiamen GR Fri, 06 Dec 2013 09:37:00 GMT
RB724278084CN Opening Xiamen GR Sat, 07 Dec 2013 18:40:00 GMT
RB724278084CN Dispatching Xiamen GR Sat, 07 Dec 2013 20:13:00 GMT
RB724278084CN Opening Shanghai GR Tue, 10 Dec 2013 01:40:00 GMT
RB724278084CN Departure from outward office of exchange Shanghai GR Tue, 10 Dec 2013 14:19:00 GMT
RB724278084CN Delivery to airport Shanghai GR Wed, 11 Dec 2013 13:11:00 GMT
RB724278084CN 2013 NULL PVG GR 20131211 1311
that's the info I get when I track my parcel...what does NULL PVG means??when should I expect to receive it??I worry I might not get it...! :/ :( Please someone help!