Which empire stretching from the west end of the Great Wall of China to present-day Kazakhstan was founded by the Choros
Choros: Choros or Tsoros (Mongolian: Цорос ) was the ruling clan of the Dzungars and Dörbet Oirat and once ruled the whole Four Oirat. Choros:  They founded the Dzungar Khanate in the 17th century. Dzungar Khanate:  It covered the area called Dzungaria and stretched from the west end of the Great Wall of China to present-day Kazakhstan, and from present-day Kyrgyzstan to southern Siberia.
Dzungar Khanate