CY287877885DE is still in China Post Beijing office waiting for import customs clearance.

the delay is caused by following reason:
1)Shipper forgot to print receiver's mobile phone number or receiver did not check the message from China Post sent to his/her mobile phone which will guide him to do online customs clearance. In this case, receiver needs to call china post hotline 11185 and make customs clearance in person.

2)Receiver does not want to make customs clearance and accept the parcel. This often happens when parcel is a return for refund. Many bad sellers alway play such game to avoid refund. If this is your case, china post can't do anything because this is not a integrity problem instead of a shipping problem. You need to contact your marketplace and file dispute or complaints against seller.