When Emperor Wenzong died in 1332, his widow, Empress Dowager Budashiri respected his will to make the son of Kuśala's succeed to the throne instead of Wenzong's own son, El Tegüs. However, it was not Toghon Temür but his younger half-brother Rinchinbal, who was enthroned as Rinchinbal Khan (Emperor Ningzong). However, he died only two months into his reign. The de facto ruler, El Temür, attempted to install El Tegüs as emperor but was stopped by Empress Budashiri. As a result, Toghon Temür was summoned back from Guangxi. El Temür feared that Toghon Temür, who was too mature to be a puppet, would take arms against him since he was suspected of the assassination of Toghon Temür's father, Emperor Mingzong. The enthronement was postponed for six months until El Temür died in 1333. In 1333, Toghon Temür first met Lady Ki, a Korean concubine, with whom he fell deeply in love. Lady Ki had been sent to China sometime in the late 1320s as "human tribute" as the kings of Goryeo were required to send a certain number of beautiful teenage girls to Yuan to serve as concubines after the Mongol invasions. The new emperor appointed his cousin El Tegüs crown prince as he was ward of El Tegüs' mother Empress Dowager Budashiri, but he was controlled by warlords even after El Temür's death. Among them, Bayan became as powerful as El Temür had been. He served as minister of the Secretariat and crushed a rebellion by El Temür's son Tang Ki-se. During his despotic rule, he made several purges and also suspended the imperial examination system. When Toghon Temür tried to promote Lady Ki to secondary wife, which was contrary to the standard practice of only taking secondary wives from Mongol clans, it created such opposition at court to this unheard of promotion for a Korean woman that he was forced to back down. In 1339, when Lady Ki gave birth to a son, whom Toghon Temür decided would be his successor, he was finally able to have Lady Ki named his secondary wife in 1340. As Toghon Temür matured, he came to disfavor Bayan's autocratic rule. In 1340 he allied with Bayan's nephew Toqto'a, who was in discord with Bayan, and banished Bayan in a coup.