my first post as well.
apologies if alreadsy posted, but as per the article by British IT news website The Register, the scale model of the landscape at Huangyangtan appears to be identical to a section of the planet at Karakoram mountains (border India and China).
go to:
34 05 55.62N 79 46 19.78 E, and rotate anticlockwise slightly and view from about 1700ft and eye alt of 226 miles to get the same scale. Pretty close match. Note the pits to the NE of the model site in china where they might have dug out fill to make the model

agree with other post that it could be a military training model - despite the abilty of using computer aided mapping etc, nothing beats the real thing in terms of being there and tasting the grit!

charliebouy