Why is "Emperor An of Jin" trending?

Wikipedia Overview

Emperor An of Jin, personal name Sima Dezong (司馬德宗), was an emperor of the Eastern Jin in China. He was described as so developmentally disabled that he was unable to speak properly, clothe himself, or be able to express whether he was hungry or full. He was created crown prince in 387 and ascended the throne in November 396. Because of his disability, the actual power was controlled by his uncle, Sima Daozi, Prince of Kuaiji. During his reign, regents and warlords dominated the Jin regime. Revolts by various governors also ravaged the land. From 398 to 403, there were constant revolts and civil war campaigns. In 403, the Jin regime was usurped by the warlord Huan Xuan, and while Emperor An was restored in 404, the Jin Dynasty was nearing its end. With the warlord Liu Yu as the actual power, Jin destroyed Southern Yan and Later Qin, greatly expanding its territory. However, with Liu Yu up in the north, the renegade governor of Guang Province, Lu Xun, rebelled and threatened the capital city Jiankang, before Liu Yu returned and crushed the revolt. In 419, Emperor An was strangled under the order of Liu Yu and replaced with his brother Emperor Gong, who would be the last emperor of the dynasty, before Liu Yu took the throne and establish the Liu Song dynasty.