My parcels RV280555188CN And RV283247274CN are still stuck at Beijing airline. It has been three days and there has been no updates. Can you tell me how long till the parcels reach my country?

Hi I bought an item from dhgate and the tracking hasn't changed in 3weeks LV303819177CN is the tracking no.
Any help would be appreciated thank you.

Package RZ375145293GB has been at Shenzhen processing centre now arriving 26-03-2018. Saying has imported mutual seal (domestic), could you please let me know what that means, also how long till delivery, thank you, Kind Regards Robert Atkinson