Rashid-al-Din Hamadani
Chupan attempted to neutralize the influence of the viziers. In 1318, he convinced the discredited former vizier Rashid-al-Din Hamadani to return to the Ilkhanid court. Rashid, who had many enemies, was accused of poisoning Öljeitü soon after he returned. Chupan promptly turned on him, and Rashid-al-Din was put to death in July of that year.