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Cao Cao died in 220 and was succeeded by his son, Cao Pi, who forced the last Han ruler, Emperor Xian, to abdicate the throne in his favour. Cao Pi then established the state of Cao Wei and declared himself emperor. Liu Bei contested Cao Pi's claim to the throne and proclaimed himself "Emperor of Shu Han" in 221. Although Liu Bei is widely seen as the founder of Shu, he never claimed to be the founder of a new dynasty; rather, he viewed Shu as a continuation of the fallen Han dynasty.
221