Dzungaria (also spelled Zungharia) is a geographical region in northwest China corresponding to the northern half of Xinjiang, also known as Beijiang (Chinese: 北疆; pinyin: Běijiāng; literally: "Northern Xinjiang"). Bounded by the Tian Shan mountain range to the south and the Altai Mountains to the north, it covers approximately 777,000 km² (300,000 sq mi), extending into western Mongolia and eastern Kazakhstan.