贾餗
Meanwhile, Emperor Wenzong, Zheng, and Jia's fellow chancellor Li Xun were plotting a slaughter of the powerful eunuchs, without Jia's knowledge. When Li Xun launched the plot (later known as the Ganlu Incident) on December 14, 835, the eunuchs seized Emperor Wenzong, and the plot failed. Li Xun fled out of Chang'an, while Jia and fellow chancellors Wang Ya and Shu Yuanyu returned to the Office of the Chancellors, believing that Emperor Wenzong would soon summon them to deal with the aftermaths, and they ordered the imperial officials under them to continue working normally. Soon thereafter, however, the eunuch-commanded Shence Army () soldiers began attacking the governmental buildings, as the eunuchs believed the officials to be complicit with the plot. As the chancellors were about to have lunch, this was reported to them, and they fled. Jia spent a night in hiding in civilian clothing, but the next day, believing that he could not flee successfully anyway, changed into mourning clothes and rode a donkey to Xing'an Gate (), informing the soldiers there, "I am Chancellor Jia Su. I was tainted by wicked people. Please deliver me to the Shence Army." The soldiers there did so. Meanwhile, the eunuchs submitted a confession that Wang Ya wrote after being tortured, in which he claimed that he and the other imperial officials had intended to overthrow Emperor Wenzong and replace him with Zheng, and Emperor Wenzong subsequently accepted the confession as true.