My package registered under the number of CC302839475HU is being held under customs procedure for over 2 weeks now. Why did the process get stuck, is there anything I can do to help it?

I have a package coming from China Post with tracking AQ604698907CN. When I look up the status of the package it shows out for delivery on October 9th. However, we have not received the package and was not informed to pick up the package either. I am wondering where this package is and when it will be redelivered.

I have a package from the Netherlands, and it was sent to China in last December. However, after the package failed to deliver (I received no message or call), the package somehow was sent back and the last time the specific location was given was one month ago in Shanghai. And the website shows that package was sent to another carrier. Is the package was sent back to the Netherlands? How can I have my package????

the package code is RI108912006NL