This is a very interesting site with lots happening. There are 2 weird looking patterns which are supposed to be spy satellite calibration sites. There is 3 mock airfield on different sizes, shape and this square where you can see numerous impacts from warheads and sub-munitions.
Military - R&D, Scientific - Test Facility
Also to the west, there is LOP NOR, which is China nuke test range. To the east, you will find the 404 Plutonium Facility. To the south, you have a quite expansive ICBM range of DAQAIDAM/MAHAI. Plenty of interesting stuff.