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In page Aksai Chin:

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In June 2006, satellite imagery on the Google Earth service revealed a 1:500[6] scale terrain model of eastern Aksai Chin and adjacent Tibet, built near the town of Huangyangtan, about 35 kilometres (22 mi) southwest of Yinchuan, the capital of the autonomous region of Ningxia in China.[7] A visual side-by-side comparison shows a very detailed duplication of Aksai Chin in the camp.[8] The 900 m × 700 m (3,000 ft × 2,300 ft)[citation needed] model was surrounded by a substantial facility, with rows of red-roofed buildings, scores of olive-coloured trucks and a large compound with elevated lookout posts and a large communications tower. Such terrain models are known to be used in military training and simulation, although usually on a much smaller scale.