Xinjiang with its capital at Ürümqi , is officialy known as Xinjiang Uyghur Autonomous Region 新疆维吾尔自治区 and has a With a documented history of at least 2,500 years. 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. Xinjiang as abundant oil reserves and is China's largest natural gas-producing region. It is home to a number of ethnic groups including the Uyghur, Han, Kazakh, Tajiks, Hui, Kyrgyz, and Mongol, with a majority of the population adhering to Islam. The name "Xinjiang", literally means "New Frontier". This autonomous region was established on October 1, 1955. The PRC's first nuclear test was carried out at Lop Nur, Xinjiang, on October 16, 1964.