Daxia, Ta-Hsia, or Ta-Hia (Chinese: 大夏; pinyin: Dàxià) was apparently the name given in antiquity by the Han Chinese to Tukhara or Tokhara: the main part of Bactria, in what is now northern Afghanistan, and parts of southern Tajikistan and Uzbekistan. The name "Daxia" first appears in Chinese accounts from the 3rd century BCE, to designate a kingdom in the far west – possibly a consequence of the first contacts with the expansion of the Greco-Bactrian Kingdom – and then is used by the explorer Zhang Qian in 126 BCE to designate Bactria.