How did the Kangxi emperor remove Oboi from power in 1669?

In 1669, the 15-year-old Kangxi emperor successfully removed the powerful minister Oboi from power by orchestrating a strategic coup. Having been under the control of four regents since his ascension, Kangxi sought to reclaim actual authority after the death of the regent Sonin and the subsequent rise of Oboi as a virtual dictator.1

To execute the removal, the emperor enlisted the support of his grandmother, the grand empress dowager, and his Chinese tutor, Xiong Cili. The final confrontation took place in the audience room, where Kangxi had hidden a group of young wrestlers. When Oboi appeared, the wrestlers emerged from their hiding place behind the throne and jumped upon the minister to arrest him. This decisive action effectively ended Oboi's regency and demonstrated to the public that the young emperor had become the true master of the Qing dynasty.1