Dorgon's unexpected death on 31 December 1650 during a hunting trip triggered a period of fierce factional struggles and opened the way for deep political reforms.
Because Dorgon's supporters were still influential at court, Dorgon was given an imperial funeral and was posthumously elevated to imperial status as the "Righteous Emperor" (yi huangdi 義皇帝).
On the same day of mid-January 1651, however, several officers of the White Banners led by former Dorgon supporter Ubai arrested Dorgon's brother Ajige for fear he would proclaim himself as the new regent; Ubai and his officers then named themselves presidents of several Ministries and prepared to take charge of the government.

Meanwhile, Jirgalang, who had been stripped of his title of regent in 1647, gathered support among Banner officers who had been disgruntled during Dorgon's rule.
In order to consolidate support for the emperor in the two Yellow Banners (which had belonged to the Qing monarch since Hong Taiji) and to gain followers in Dorgon's Plain White Banner, Jirgalang named them the "Upper Three Banners" (shang san qi 上三旗; Manchu: dergi ilan gūsa), which from then on were owned and controlled by the emperor.
Oboi and Suksaha, who would become regents for the Kangxi Emperor in 1661, were among the Banner officers who gave Jirgalang their support, and Jirgalang appointed them to the Council of Deliberative Princes to reward them.

On 1 February, Jirgalang announced that the Shunzhi Emperor, who was about to turn thirteen, would now assume full imperial authority.
The regency was thus officially abolished.
Jirgalang then moved to the attack.
In late February or early March 1651 he accused Dorgon of usurping imperial prerogatives: Dorgon was found guilty and all his posthumous honors were removed.
Jirgalang continued to purge former members of Dorgon's clique and to bestow high ranks and nobility titles upon a growing number of followers in the Three Imperial Banners, so that by 1652 all of Dorgon's former supporters had been either killed or effectively removed from government.
Dorgon's unexpected death on 31 December 1650 during a hunting trip triggered a period of fierce factional struggles and opened the way for deep political reforms. Because Dorgon's supporters were still influential at court, Dorgon was given an imperial funeral and was posthumously elevated to imperial status as the "Righteous Emperor" (yi huangdi 義皇帝). On the same day of mid-January 1651, however, several officers of the White Banners led by former Dorgon supporter Ubai arrested Dorgon's brother Ajige for fear he would proclaim himself as the new regent; Ubai and his officers then named themselves presidents of several Ministries and prepared to take charge of the government.
Meanwhile, Jirgalang, who had been stripped of his title of regent in 1647, gathered support among Banner officers who had been disgruntled during Dorgon's rule. In order to consolidate support for the emperor in the two Yellow Banners (which had belonged to the Qing monarch since Hong Taiji) and to gain followers in Dorgon's Plain White Banner, Jirgalang named them the "Upper Three Banners" (shang san qi 上三旗; Manchu: dergi ilan gūsa), which from then on were owned and controlled by the emperor. Oboi and Suksaha, who would become regents for the Kangxi Emperor in 1661, were among the Banner officers who gave Jirgalang their support, and Jirgalang appointed them to the Council of Deliberative Princes to reward them.
On 1 February, Jirgalang announced that the Shunzhi Emperor, who was about to turn thirteen, would now assume full imperial authority. The regency was thus officially abolished. Jirgalang then moved to the attack. In late February or early March 1651 he accused Dorgon of usurping imperial prerogatives: Dorgon was found guilty and all his posthumous honors were removed. Jirgalang continued to purge former members of Dorgon's clique and to bestow high ranks and nobility titles upon a growing number of followers in the Three Imperial Banners, so that by 1652 all of Dorgon's former supporters had been either killed or effectively removed from government.
Shunzhi Emperor