I am here: 37 26.437 N 110 41.967 E at 685m as of 17/07/2013 09:30 BST http://maps.google.com/maps?q=loc:37.44062,110.69946
Stuck at this location for several hours, an internal border between regions (roughly equivalent to US States, I think). The problem - one piece of paper is missing one stamp and the official at the border won't let us cross without it, as it is on his neck. That many other officials haven't worried about it gives you a clue to the state of the officialdom here.
As we say many times a day... It's China. :)