 After assuming the governorship of Sistan, Qutb al-Din handed out the governorship of several towns to other Mihrabanids, at the same time initiating a purge amongst the Mihrabanid ranks by executing several family members he considered troublesome.In 1405 he was summoned by Timur, who was preparing to invade China, to Otrar.At the head of an army of Sistan, Qutb al-Din marched north, but at Herat he received news of Timur's death from Shah Rukh and turned around.