The Yuezhi, or Rouzhi, also known as the Da Yuezhi or Da Rouzhi ("Great Yuezhi"), are an ancient Central Asian people believed by most scholars to have been an Indo-European people and may be the same as or closely related to the Tocharians of Classical sources.

hey were originally settled in the arid grasslands of the eastern Tarim Basin area, in what is today Xinjiang and western Gansu, in China, before they migrate to Transoxiana, Bactria and then northern South Asia, where they may play a part in forming the Kushan Empire.