Yang Yi
Yang Yi was from Xiangyang Commandery in Jing Province, which is around present-day Xiangyang, Hubei. He was born sometime in the late Eastern Han dynasty and initially served as a Registrar () under Fu Qun (), the Inspector () of Jing Province. However, later, he defected to Guan Yu, a general under the warlord Liu Bei. Guan Yu appointed Yang Yi as an Officer of Merit () and sent him to Chengdu – the capital of Yi Province, which covered present-day Sichuan and Chongqing – to meet Liu Bei. Liu Bei had a discussion with Yang Yi on military strategy and politics and was so pleased with his replies that he appointed Yang Yi as a Senior Clerk () in his administrative office. He promoted Yang Yi to a Master of Writing () in 219 after declaring himself "King of Hanzhong" () following his victory in the Hanzhong Campaign.