劉瑾
By 1510 the relations between Liu Jin and Zhang Yong have significantly deteriorated. As an inspector of the army Zhang Yong was sent to Shaanxi to oversee the suppression of the Prince of Anhua rebellion by the imperial forces. His companion during the travels was Yang Yiqing, the supreme commander of the army, who was once forced out of office by Liu Jin in 1507 and held a grudge against him. Yang Yiquing managed to convince the eunuch that Liu Jin was planning an operation that would put Zhang Yong's life in danger. He claimed that Liu Jin was planning to assassinate the emperor and put his own grand-nephew on the throne, and that the plan would begin on September 17, 1510.