For those how buy in an online market such as ebay, amazon, aliexpress, gearbest between others, there is a website that can help you tracking your package. This is the website: https://geartrack.hdn.pt/
This is the outlook of the website. You can see which posts you can track, independently of which country you are.
Let's see an example from one of my purchases in gearbest.
I have bought one smart weight scale from China. As soon as they dispach the item, they will give you a tracking number. Mine was SU1511095084108 as you can see below.
You copy that number and past it here (where it says "adicionar" which means to add)
This is what you will see since the package was dispached from Hong Kong until arrive Spain and then Portugal.
I hope you found this useful to track your orders.