Sent to airline 12 days ago (Registered Air Mail)

Hello, as title says, last update the parcel had is "Sent to airline" (tracking number: LF995713410CN), on 15.3.2019 at 00:10 in the morning. Completely, the parcel has been ordered and sent through China Post on 8.3., so it's 19 days on the way to Slovakia, however, the package is even not in Slovakia, just status is stuck on Sent to airline and Air Mail should take only 14 days? What happened? Thanks for answers :-)