Geng Ji and Wei Huang's Lantern Festival coup

Geng Ji and Wei Huang’s Lantern Festival coup is a failed attempt to turn opposition to Cao Cao’s assumption of royal power into an armed restoration of imperial authority. Planned for the festival night, the conspiracy depends on coordinated attacks, a command from the emperor, and a wider rising in the capital. A single escape disrupts that sequence; by dawn the revolt is defeated, and Cao Cao uses its aftermath to widen the purge and reinforce his court.

Causes and Conspiracy

In early 218, Geng Ji, a minor member of Cao Cao’s staff, approached Wei Huang, who was responsible for Cao Cao’s protection. Both were appalled that Cao Cao had taken the title of king. They brought Jin Yi into their confidence because he too resented Cao Cao’s usurpation of imperial power, though his friendship with Wang Bi made them wary. The conspirators made sure Jin Yi was on their side before committing to the plot.

Their plan was to kill Wang Bi, bring the Royal Guard over to the conspirators, and then use the guard to kill Cao Cao. They recruited two sons of the imperial physician Ji Ping, whom Cao Cao had executed years earlier; the sons had escaped and secretly returned to the city. The plot thus joined resentment at Cao Cao’s political ascendancy with the Ji family’s existing grievance, while making control of the guard the necessary first step toward an attack on Cao Cao.

The Planned Rising

The conspirators chose the night of the fifteenth day of the first month, when the annual Lantern Festival marked the first full moon of the new year. Their scheme assigned distinct tasks to several groups. Geng Ji and Wei Huang would bring their armed staff to Wang Bi’s Royal Guard camp and charge when fires appeared there. After Wang Bi’s death, they would go with Jin Yi to the palace; Jin Yi would ask the emperor to ascend the Tower of Five Phoenixes and issue an order for Cao Cao’s arrest.

At the same time, the two Ji brothers would enter the city and set fires as a signal, then summon ordinary citizens to rise, seize those they regarded as traitors, and defend the capital against a counterattack. Once the emperor had called for the arrest of traitors, the plotters would attack Yejun, capture Cao Cao, and call on Xuande to rescue the imperial family. The design aimed to convert a palace coup into a public and military challenge to Cao Cao’s rule, with the emperor’s command serving as its claim to legitimacy.

The conspirators assembled substantial but limited manpower: about four hundred members of Geng Ji and Wei Huang’s staffs armed themselves, and another three hundred men came from the Ji family. The plan therefore rested on coordination and surprise rather than on a force shown to be capable of matching Cao Cao’s broader military power.

The Coup Collapses

The festival lights filled the city, and soldiers, caught up in the occasion, were more relaxed than usual. Wang Bi was dining with his officers when the alarm of fire sounded. He recognized that a coup was underway and fled on horseback. Though wounded by an arrow, he reached Jin Yi’s house ahead of those pursuing him and pounded on the closed door. The male staff were away participating in the revolt. Jin Yi’s wife, mistaking Wang Bi for her husband, called out to ask whether Wang Bi had been killed. Wang Bi fled again, this time to Cao Xiu outside the city, and told him of the uprising.

Cao Xiu summoned about one thousand men and rode to assist. Meanwhile, the fires had spread beyond the conspirators’ control. The Tower of Five Phoenixes burned, and the emperor had to hide in the palace. Men loyal to Cao Cao held the main gate against the rebels; beyond the capital, Xiahou Dun commanded thirty thousand soldiers stationed there after Cao Cao had heard a prophecy from Guan Lu. When Xiahou Dun and his troops arrived, the revolt was doomed. By dawn it had collapsed: the Ji brothers were dead, Geng Ji and Wei Huang had been captured, and more than a hundred of their followers had been killed.

Punishment and Political Aftermath

Xiahou Dun’s men extinguished the fires and arrested the extended families of the five plotters. Cao Cao ordered the public execution of every member of each guilty family. As Geng Ji was led to his death, he said he would return as a ghost to kill Cao Cao; he was silenced and killed. Wei Huang died by suicide. The defeat thus ended not only the conspiracy but the lives of its leaders and relatives, extending punishment from the armed participants to their families.

Cao Cao then brought the palace staff to Yejun, where he had set out red and white flags. Officials were told to stand by the red flag if they had gone out to fight the fires, and by the white if they had stayed at home. Two thirds chose red, apparently expecting to be rewarded for having helped. Cao Cao instead accused them of having gone out to support the rebels and ordered their execution. More than three hundred died; those at the white flag were rewarded and returned to the city. The test transformed the apparent choice to assist in an emergency into grounds for punishment, revealing how the defeated coup enabled Cao Cao to act against officials beyond its known participants.

Wang Bi later died from his wound and received a ceremonial funeral. Cao Xiu was appointed to command the Royal Guard. Cao Cao, in turn, increased the size, splendour, and authority of his court. The attempted uprising had sought to mobilize imperial office against him; its failure instead gave him an occasion to consolidate control of the guard, punish suspected opposition, and enlarge his court.