Quote from vitor.dias on January 8, 2019, 16:29
I am waiting for an order from china sent by china post (RY442790190CN) to Portugal. After researching through the tracking number I find that on December 12, 2018 it left China, however, almost a month later it has not yet been delivered to me, nor is there any entry in Portugal. Normally it takes a week to get from china to portugal. I have already contacted the Portuguese postal services and they answered that they have not received the order yet and that I should contact china post since it has already been a long time.
Where is my order?

http://track-chinapost.com/startairmail.php shows RY442790190CN was sent to airline on Dec 13.

China Post will lost control of the parcel after sent to airline. so there will be no update anymore after sent to airline date.

Sent to airline does not mean you will get the parcel very soon. It will keep waiting 5 to 10 days in airline warehouse waiting flight space and another 1 to 4 weeks import customs processing in destination country(speed depending on country). The status will stuck at "sent to airline" during this 2 to 8 weeks period.

Once it passes import customs clearance, Portugal Post will scan and update its new location for China Post database and you will see new status.

So you no need do anything, just wait some more time.