Emperor Xian of Han
Cao Cao died on 15 March 220. His son and successor, Cao Pi, soon forced Emperor Xian to abdicate the throne in favour of himself, ending the Han dynasty. Cao Pi established a new state known as Cao Wei (sometimes known inaccurately as the Kingdom of Wei), and he granted Emperor Xian a noble title – Duke of Shanyang (山陽公). The former Emperor Xian died in 234 and was buried with honours befitting an emperor, using Han ceremonies, and the then emperor of Wei, Cao Rui, was one of the mourners. As Emperor Xian's crown prince was already dead, his grandson Liu Kang (劉康) inherited his dukedom, which lasted for 75 more years and two more dukes, Liu Jin (劉瑾) and Liu Qiu (劉秋), until the line was exterminated by invading Xiongnu tribes in about 309, during the Jin dynasty. This practice of an emperor conferring hereditary nobility on his predecessor, from whom he usurped the throne, was known as "er wang san ke" (二王三恪).
Emperor He of Southern Qi
Emperor He of Southern Qi ((南)齊和帝) (488–502), personal name Xiao Baorong (蕭寶融), courtesy name Zhizhao (智昭), was the last emperor of the Chinese dynasty Southern Qi. He was put on the throne by the generals Xiao Yingzhou (蕭穎冑) and Xiao Yan in 501 as a competing candidate for the throne to his violent and arbitrary older brother Xiao Baojuan. In 502, with Xiao Baojuan having been defeated and killed and Xiao Yingzhou dead, Xiao Yan seized the throne from Emperor He and took the throne himself, ending Southern Qi and starting Liang Dynasty. Soon, Xiao Yan had the 14-year-old former Emperor He put to death.