the tracking system most recent update advises that the delivery has been made to the following location :
Central post office - RIYADH, Your shipment has arrived Central post office - RIYADH
what is the specific address for this location and is it a Post office managed by China post or Saudi Post. Please provide more details

I was expecting the package from China to US with the tracking number provided as UF529387457YP. The sender happens to write the wrong address, and I would need to contact the US post office to set up new delivery address. However, when I provided this tracking number to US post office, they could not locate anything. It seems that it is a tracking number in China post system, but not the US one. Would you please advise what is the corresponding USPS tracking number for UF529387457YP? Thank you!

on 2018/2/9 unsuccessful delivery attempt on 2 package (Tracking ID RI242776189GB RI242776175GB. I need to locate which China Post office has these packages so I can collect them.