My package number is AM148288819CN
It cleared US Customs March 2nd, and there haven't been any updates since then. Where is it? 16+ days with no updates when it's done with all the time-consuming steps already is ridiculous. Is it lost? Did it get lost in the processing facility?

A package was sent to Pudong new area postal code 201203 but on the package lable and customs form the postal code was left out; and on May 30, 2017, the tracking shows as "Attempted Delivery Abroad" . The question is where does the package stop right after customs clearance was completed? Is there any phone number of the post office or processing ctr to call? So far the USPS in Alexandria, VA has sent a package inquiry asking to expedite the delivery to the corrected postal code and address. Up to now 6/12/17 the package hasn't moved to the next step yet.

Tracking number: AG274304203CN
On February 2/28, I received the notification "United States, destination country customs clearance completed [United States]". Since then, I have not received any sort of update, and nothing has came in the mail either. Is this much of a delay normal, or is this a cause for concern? Who should I contact if this is a concern?