The Kushan Empire was an ancient prosperous country that existed in Central and South Asia. During its peak period (105-250 AD), its territory extended from present-day Tajikistan to the Caspian Sea, Afghanistan, and the Ganges River basin. Guishuang is a branch of the Dayue people who lived in the Amu Darya and Syr Darya river basins in the 2nd century BC. In 130 BC, the Yue people migrated south to conquer Daxia and divided it into five tribes, each with a chief called the Marquis of Xi. The Guishuang Xiahou Qiu, one of the Five Xiahou, eliminated the other Xiahou, unified the five tribes, and established the Guishuang Kingdom. However, Qiu defeated Anxi and attacked the Kabul River Basin and Kashmir region southward, eventually establishing the capital as Gaofu.