Yang Yi

Yang Yi (died 235), style name Weigong, was a minister of the state of Shu Han during the Three Kingdoms period.

Early life and career
Yang Yi was a native of Xiangyang commandery (襄陽郡) 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 (主簿) under Fu Qun (傅羣), the Inspector (刺史) of Jing Province. However, later, he defected to Guan Yu, the Administrator (太守) of Xiangyang and a general under the warlord Liu Bei. Guan Yu appointed Yang Yi as an "Officer of Merit" (功曹) 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 Yang's replies that he recruited Yang to be a Senior Clerk (掾) in his administrative office. He promoted Yang Yi to a "Master of Writing" (尚書) in 219 after declaring himself "King of Hanzhong" (漢中王) following his victory in the Hanzhong Campaign.

In 221, Liu Bei proclaimed himself 'Emperor' and founded the state of Shu Han to challenge Cao Pi's claim to the Han throne. In the following year, when Liu Bei was away on a military campaign against his ally-turned-rival Sun Quan, Yang Yi had disagreements with Liu Ba, the Director of the Imperial Secretariat (尚書令), so he was sent out of Chengdu to be the Administrator of Hongnong (弘農) commandery.

Mid career
After Liu Bei's death in 223, Yang Yi continued serving in Shu under Liu Bei's son and successor, Liu Shan, who was assisted by the chancellor-regent Zhuge Liang. In 225, Zhuge Liang had Yang Yi transferred to the Chancellor's Office, where the latter served as an Army Advisor (參軍). Later that year, Yang Yi followed Zhuge Liang on a campaign against some rebel forces and restless tribes in the southern parts of Shu. In 227, he accompanied Zhuge Liang to Hanzhong commandery. In 230, he was promoted to "Chief Clerk" (長史) and appointed as "General Who Pacifies the Army" (綏軍將軍). Over the following years, when Zhuge Liang led a series of military campaigns against Shu's rival state Cao Wei, Yang Yi was in charge of managing manpower and logistics.

Yang Yi had disagreements with Wei Yan, a senior Shu general, and they frequently quarrelled. Zhuge Liang was upset by the lack of harmony between his two subordinates but was unwilling to side with either of them because he appreciated the talents of both men. In 234, Yang Yi followed Zhuge Liang on another campaign against Wei, which led to the stalemate at the Battle of Wuzhang Plains. Zhuge Liang died of illness during the standoff, after which Yang Yi and the others ordered a retreat back to Shu. Around this time, relations between Yang Yi and Wei Yan deteriorated the point of conflict, where both of them accused each other of treason and nearly started a civil war in Shu. The conflict concluded with the downfall and death of Wei Yan.

Later life and death
After returning to the Shu capital Chengdu, Yang Yi perceived himself to have had made great contributions to his state so he strongly believed that he would be chosen to succeed Zhuge Liang as the head of government in Shu. He asked a Commandant (都尉) Zhao Zheng (趙正) to use the I Ching to predict his fortune for him and he felt gloomy when the prediction was not to his expectation. When Zhuge Liang was still alive, he had secretly noted that Yang Yi was impulsive and narrow-minded so he considered Jiang Wan to succeed him instead. After Zhuge Liang's death, Jiang Wan was appointed as the Director of the Imperial Secretariat (尚書令) and the Inspector (刺史) of Yi Province; Yang Yi, on the other hand, was appointed as a Central Military Advisor (中軍師) — an appointment with no actual power.

Initially, when Yang Yi was serving as a "Master of Writing" (尚書), Jiang Wan ranked lower than him, but both of them were later appointed as Chief Clerks under Zhuge Liang. Yang Yi viewed himself highly and saw himself as superior to Jiang Wan because he had been serving in Shu longer than Jiang. He openly expressed his dissatisfaction by grumbling and complaining. The others ignored him due to his poor choice of words in conveying his frustration, except for Fei Yi, who comforted him. Yang Yi once told Fei Yi, "When the Chancellor (Zhuge Liang) died, I should have brought along my men and defected to Wei if I knew I would end up in this situation today! I deeply regret but there's nothing I can do now." Fei Yi secretly reported Yang Yi's words to the Shu imperial court. In 235, Yang Yi was stripped off his appointment, demoted to the status of a commoner, and exiled to Hanjia commandery (漢嘉郡; around present-day Lushan County, Ya'an, Sichuan). While he was in Hanjia, Yang Yi wrote a memorial to the Shu imperial court, using emotionally charged language to express his anger and lash out at the court. The court deemed Yang Yi's memorial defamatory so it issued a warrant for Yang's arrest. Yang Yi committed suicide. His family returned to Chengdu after his death.

Yang Lü
Yang Yi had an elder brother, Yang Lü (楊慮), whose style name was "Weifang" (威方). Yang Lü was already known for his good moral conduct in his youth and was regarded as a learned scholar in the Jing Province region. He received several invitations to serve in the government but he declined all of them. He died at the age of 16. His fellow townsfolk referred to him as "Lord Yang of Virtuous Conduct" (德行楊君).