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).
Chen Han
The Han (1360–1364), officially the Great Han and known as Chen Han today, was a short-lived Chinese dynasty in the middle Yangtze region during the chaotic late Yuan dynasty. It was founded by the Red Turban rebel general Chen Youliang who first dominated, and later assassinated the Red Turban leader Xu Shouhui and usurped his regional regime. At its height, the Han territory encompassed the modern provinces of Hubei, Jiangxi, and Hunan, but Jiangxi mostly fell to another warlord Zhu Yuanzhang in 1361. In 1363, Chen and Zhu fought in the decisive Battle of Lake Poyang, where Chen was killed. His teenaged son Chen Li succeeded him, but no longer had the resources to resist the powerful Zhu, who easily conquered Han the next year. Chen Li who surrendered was exiled to Goryeo, and became the progenitor of the Korean Yangsan Jin clan.