My guess is that this is part of some sort of cloaking device, or stealth technology.
I have a feeling our spies know exactly what it is.
Although it could be an abandoned mega plan for a Walmart parking lot.
I have read that it may be used to calibrate China's spy satellites.
http://www.lifeslittlemysteries.com/mystery-structures-china-desert-spy-satellite-2184/
They are antennas to send signals and power to satellites which in return, can direct beams back to earth to destroy the target, ie: the blown up boxes.
China Mystery Patterns?