Chang Tang is a vast high-altitude plateau stretching 1,600 kilometres (990 miles) across the Tibetan Plateau. The inhospitable land is inhabited by roughly half a million Changpa, but they’re hard to spot. The Changpa are a nomadic people who know all about hardship thanks to the near-Arctic climate in which they they survive and the brutality of the Chinese occupation. When Swedish explorer Sven Hedin crossed Chang Tang he reported not seeing a single person for 81 days. In 2009, the European Commission’s Joint Research Centre named the Tibetan Plateau as the world’s most remote place after compiling a map showing the most and least interconnected places on earth.