The tension between the two Yellow Banners factions and Suksaha in the first years of the regency of Kangxi has been kept in check by an even handed Sonin; the four ministers have managed to maintain a relatively peaceful and efficient working relationship.
Sonin's health begins to deteriorate due to old age, and the dynamics of the regency began to shift as Sonin gradually takes more time off on sabbatical.
Oboi monopolizes decision making by dominating the indecisive Ebilun and works to sideline Suksaha during policy discussions especially on issues concerning the welfare of the Manchu Banners.
Sonin, realizing his days are numbered, attempts in 1667 to restore some balance to the regency and to neutralize Oboi's rapidly expanding power clique, by petitioning a request that the fourteen year old Emperor Kangxi assume personal rule ahead of schedule.
Thus, soon after his granddaughter Heseri is made the Empress Xiao Cheng Ren, leaving Suksaha at odds with Oboi politically, Emperor Kangxi formerly takes over the reins of power in a ceremony on August 25, a month after Sonin's death.
This is followed by an official decree technically downgrading the three remaining ministers to the status of "advisers" while still remaining at their posts.
Even with the formal authority of office, however, the young Emperor finds it difficult to curb the growing power of Oboi.
Oboi and his ally Banbursan, in a fierce power struggle, produce a list of twenty-four crimes allegedly committed by Suksaha and compels the young emperor to execute Suksaha and his family.
Oboi controls Ebilun completely and soon establishes a system of near absolute rule unto himself.