[3][4] However, in an allegation that Emperor Wenzong's brother Emperor Wuzong later made against her (posthumously) and the chancellor Yang Sifu, Emperor Wuzong stated that Yang Sifu had written a letter to her urging her to assume regency as an empress dowager in which Yang Sifu referred to her as an aunt.
It was further said that Li Yong, who was then crown prince, himself favored games and feasting and had become close to scoundrels, leading to Consort Yang's continually making accusations against him.
As a result, in 838, Emperor Wenzong put Li Yong under arrest and convened a group of high-level officials, announcing that he was intending to depose Li Yong from his position as Crown Prince.
[2] (Li Yong himself died later that year, and some historians, include the modern Chinese historian Bo Yang, believed that he was assassinated at the implicit approval of Emperor Wenzong and Consort Yang.
(As Emperor Wuzong later would allege, he believed that Li Rong flattered Consort Yang in order to receive her favor.)