Taking 1,800 men with him, Kuśala set out for Dadu. On August 26, he met with Tugh Temür in Ongghuchad (Onggachatu), where Tugh Temur had built the city of Zhongdu. He suddenly died only 4 days after a banquet with Tugh Temür. The Yuan shi states that the luckless Kuśala Khan died of violence. It seems that Kuśala was poisoned by El Temür, who feared losing power to princes and officers of the Chagatai Khanate and Mongolia, who followed Kuśala. Tugh Temür was restored to the throne on September 8.