Because of the situation at that time, as we said earlier, San Francisco was too big to fail, and it was only a matter of time before the imperial court cut it, and it was better to cut it early than late, although Wu Sangui and other San Francisco were old and had to be disposed of.

It can be said that this move by Emperor Kangxi was generally opposed by courtiers at that time, because many people thought that the main task of the court at this time should be to maintain the stability of the country as soon as possible and eliminate the remnants of the former Ming Dynasty that were still enemies of the Qing court, but this view was quickly denied by Emperor Kangxi. He believed that,

San Francisco is the biggest stumbling block to the imperial power. If San Francisco can't be laid off, the future work will be even worse. Especially Wu Sangui, the king of Pingnan in Yunnan at that time, not only chose officials to pay taxes without reporting to the court, but also took a lot of munitions from the court every year. At that time, the Qing court was unable to support San Francisco, which was too big to be lost. At this time, Kangxi made up his mind to formally cut the vassal.

Other reasons to appease San Francisco:

Secondly, it brought confidence to Emperor Kangxi, thinking that the strength of the Qing Dynasty was still relatively strong at that time, and both the financial resources and the number of soldiers were slightly better than those of San Francisco. More importantly, since the rule of the Qing Dynasty was just stable and people's hearts were stable at that time, if Wu Sangui unilaterally implemented it, it would inevitably cause people's hearts to float.

People in Yunnan and Guizhou will never support this kind of behavior. Therefore, once Wu Sangui is disobedient and rashly implemented, the people's hearts will be lost first. Of course, the Qing dynasty can clear its name for the activities of separatist princes.