He was the second son of
Kuśala (Emperor Mingzong) and a younger brother of
Toghun Temür (Emperor Huizong). His mother was
Babusha of the
Naiman tribe, who met Kusala when he lived in exile in
Central Asia under the
Chagatai Khanate. When his father Kuśala died and was succeeded by his younger brother
Tugh Temür (who is thought to have poisoned Kuśala), Rinchinbal was appointed to Prince of Fu. Tugh Temur made his son Aratnadara heir apparent in January 1331. In order to secure her son's throne, Tugh Temur's
Khatun Budashiri executed Rinchinbal's mother, Babusha, and exiled
Toghan Temur to
Korea. These proved unnecessary, however, Aratnadara died one month after his designation as heir. Although Tugh Temür had a son named
El Tegüs when he died in 1332, it is said that on his deathbed the Khagan expressed remorse for what he had done to his elder brother and his intention to pass the throne to Toghan Temur, Kusala's eldest son, instead of his own son. The grand councilor
El Temür resisted letting Kuśala's eldest son Toghun Temür accede to the throne since he was suspected of having poisoned his father Kuśala. When Tugh Temur's widow and El Tegüs's mother Budashiri Khatun respected Tugh Temür's will of making Kuśala's son succeed the throne, the 6 year old Rinchinbal was chosen. While Toghun Temür was kept far away from the capital
Dadu, Rinchinbal was in Dadu and had become favored by Tugh Temür. Rinchinbal was enthroned as the new emperor on October 23, 1332, but he died on December 14. in southwest China. ==Ancestry==