The tracking number used to work just fine.
Log into your account on HK.
Go to My Account and press the Check link
Klicking on the tracking number takes you directly to HongKong Post.
That used to work but seems to be different today.
You could wait a few days from the box had left HK store to the time it was registered.
Then you could follow the waiting for a free storage in a plane.
When the package had left HK post tracking you could go to your home country post homepage and follow the package home to your door.
The tracking codes ending with HK always used to work fine.
The codes ending with CH contains LiPo and are shipped with another company.
If No Tracking then the package arrives as a normal letter without any need to sign for acceptance.