Here is my story. I was in Beijing in June and I sent 2 parcels to France. I came back to France but didn't have any notification that they were here, so they returned to Beijing.
I know where they are in Beijing. I sent my friend there with a copy of my passport, a copy of the receipts (with tracking number, name, etc), and they told her NO, she can't get it for me and the only way for me to get my parcel is that I take the plane and go there.