Xinjiang Region of China at Sunset

 The sender said this is the province Xinjiang.

postmarked in 2013 with a pre-paid matching stamp and one more stamp

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Xinjiang is an autonomous region of the People's Republic of China in the northwest of the country. It is the largest Chinese administrative division and spans over 1.6 million km2. Xinjiang borders Russia, Mongolia, Kazakhstan, Kyrgyzstan, Tajikistan, Afghanistan, Pakistan and India. It has abundant oil reserves and is China's largest natural gas-producing region.

With a documented history of at least 2,500 years, a succession of peoples and empires has vied for control over all or parts of this territory. Before the 21st century, all or part of the region has been ruled, controlled, influenced by the Tocharians, Yuezhi, Xiongnu Empire, Kushan Empire, Han Empire, Former Liang, Former Qin, Later Liang, Western Liáng, Tang Dynasty, Uyghur Khaganate, Kara-Khanid Khanate, Mongol Empire (Yuan Dynasty), Dzungar Khanate, Qing Dynasty, the Republic of China and, since 1950, the People's Republic of China.