Answered by Rita from France | Apr. 13, 2014 21:17
RB506549148CN Delivery to airport Beijing SK Sat, 29 Mar 2014 06:25:00 GMT
RB506549148CN Arrival at inward office of exchange SK SK Fri, 04 Apr 2014 06:55:00 GMT
RB506549148CN NULL Bratislava, SK SK Fri, 04 Apr 2014 09:55:00 GMT
I don't know if how your national post deals with packages sent from China. Some countries changed the tracking numbers after they arrive. I guess that's why Null status appears because tracking system doesn't recognize China Post's tracking number.
Since it already arrives, I think you either wait for its delivery patiently or go to the post office to check it on your own.