Sultan Said Khan ruled the state of Yarkand (mamlakati Yarkand) from September, 1514, to July, 1533. He was born in 1487 in Moghulistan and was a direct descendant of the first Moghul Khan, Tughlugh Timur, who had founded the state of Moghulistan in 1348 (and ruled until 1363). The Moghuls were turkicized Mongols who had converted to Islam.
Some English sources refer to this ruler as Abusaid.
When the Chagatai ulus, which embraced both East and West Turkestan, collapsed, the result was the creation of two different states: Maverannahr in West Turkestan, with its capital at Samarkand, where Timur the Great came to power in 1370, and Moghulistan, with its capital at Almalik, near the present-day town of Gulja, in the Ili valley. Moghulistan embraced settled lands in Eastern Turkestan as well as nomad lands north of Tangri Tagh. The settled lands were known at the time as Manglai Sobe or Mangalai Suyah, which translates as Shiny Land, or Advanced Land Which Faced the Sun. These lands included west and central Tarim oasis-cities, such as Khotan, Yarkand, Yangihisar, Kashgar, Aksu, and Uch Turpan; and hardly involved eastern Tangri Tagh oasis-cities, such as Kucha, Karashahr, Turpan and Kumul, where a local Uyghur administration and buddhist population still existed. The nomadic areas comprised the present Kyrghyzstan and part of Kazakhstan, including Jettisu, the area of seven rivers.