Finding the Public Security Bureau, Entry and Exit Administration for processing your visa can be vexing.  Often the host will process a foreigner’s, but everybody has final responsibility to make sure it is done right.  That is why I recommend visiting the PSB and talking to the enforcement officers personally.  Make sure you go before the expiration date on your visa !

The PSB is located behind the Walmart, and taxi drivers know that location.  The building is off Lincheng Xilu, which is distinctive in that it has a lot of trees on it.  Pictures provided show the area, including bus stations.  There is an extraordinarily big rock, with the building shown in the background.  When you know what to look for, it is quite easy to find.