Why Is China Building These Gigantic Structures In the Middle of the Desert?

This is crazy. New photos have appeared in Google Maps showing unidentified titanic structures in the middle of the Chinese desert. The first one is an intricate network of what appears to be huge metallic stripes. Is this a military experiment?

Update 1 & 2: readers are finding even more weird stuff.
Update 3: some unidentified agency, company or person has been ordering hundreds of photographs of this area since 2004. Check out that story here.

They seem to be wide lines drawn with some white material. Or maybe the dust have been dug by machinery.

It's located in Dunhuang, Jiuquan, Gansu, north of the Shule River, which crosses the Tibetan Plateau to the west into the Kumtag Desert. It covers an area approximately one mile long by more than 3,000 feet wide.

The tracks are perfectly executed, and they seem to be designed to be seen from orbit.

Perhaps it's some kind of targeting or calibrating grid for Chinese spy satellites? Maybe it's a QR code for aliens? Nobody really knows.

You can check it out yourself in Google Maps here.

The second structure seems to be some kind of giant targeting grid, also north of the Shule river.

If you zoom in, you can see vehicles destroyed. It's west of what seems to be a fairly big electrical station or a radio station similar to HAARP, the High Frequency Active Auroral Research Program located near Gakona, Alaska, and funded by the US Air Force, the US Navy, the University of Alaska, and DARPA.

You can investigate here and tell us what you think in the comments.

The third one I don't know what the hell it is either, and it's perhaps the craziest of them all: Thousand of lines intersecting in a titanic grid that is about 18 miles long. Another targeting grid? A big practical joke? You can inspect it here. [Google Maps, Google Maps and Google Maps via Reddit]

Update: Readers are finding more weird stuff.

A grid similar to the first one is located here.

This one seems like another target, this time arranged radially, with planes and obstacles.

Here is a weird airport-like structure. Except it's bright cyan. Seems full of water or made of a weird material. And look at the other airport-like structure next to it. Perhaps a decoy?

This is a huge complex, ten by five miles at least. Are these huge precipitation pools of some kind? If you zoom in Google Maps (see the image below this one), you could see two cooling towers like those used in nuclear plants, as well as several water treatment plants.

The Chinese have been building huge structures in the desert for a long time. Back in 2006, they built this 1:20 scale model of disputed border region between China and India. That's a terrain model 0.7 kilometer wide by almost 1 kilometer tall. Uncanny. Why would they build such a model of a terrain? To play a 1:20 scale war with 1:20 scale tanks? Mind boggling.