Meng Da
The "Weilüe" account mentioned that Zhuge Liang planned to induce Meng Da to defect to Shu when he heard that Meng was feeling uneasy in Xincheng. Zhuge Liang wrote several letters to Meng Da and the latter replied. Shen Yi (申儀), the Administrator of Weixing (魏興; around present-day Shiquan County in Shaanxi and Yunxi County in Hubei), who had disagreements with Meng Da, secretly reported to the Wei imperial court that Meng was having dealings with Shu, but the Wei emperor Cao Rui refused to believe. Sima Yi, who was stationed at Wan at that time, sent an advisor Liang Ji (梁幾) to investigate and also urged him to travel to the capital Luoyang. Meng Da became suspicious and feared for his life, so he rebelled.