When Esen Buqa died in 1462, the Dughlat amirs were divided over whether they should follow his son Dost Muhammad, who was then seventeen or his brother Yunus Khan.
[1] Muhammad Haidar Mirza, who controlled Kashgar, was cousin to Yunus Khan (his mother was Uzun Sultan Khanim, sister of Vais Khan and aunt of Yunus Khan), but chose the former, because supported before his father and was married to Esen Buqa daughter, Daulat Nigar Khanim.
He gave his sister Husn Nigar Khanim in marriage to the young Mirza Abu Bakr, but nevertheless the latter fled to his uncle Muhammad Haidar Mirza and Dost Muhammad Khan sent Husn Nigar Khanim after him to Kashgar.
Dost Muhammad was a very brave and generous man and of so great height, that if he stood on foot in the midst of a hundred people, any one seeing him would have said he was on horseback.
[2] In the confusion following his death, Yunus Khan seized Aqsu, while his son, Kebek Sultan, was carried off to rule in Turfan.