Did Kangxi really use domestic slaves to fight Wu Sangui?

Pingfan, of course, first used the officers and men of Manchu, Han and Mongolian Eight Banners.

However, the jokes about the use of domestic slaves in the Kangxi Dynasty also have historical basis:

At that time, the war in San Francisco was very fierce, and Yunnan, Guangdong, Guangxi, Sichuan, Hunan, Fujian and Shaanxi fell one after another. Few soldiers can be recruited in Beijing and other places, and the situation is critical. When the news of Bowen's departure reached Beijing, people were frightened. The young Emperor Kangxi, reminded by his grandmother, Empress Xiaozhuang Wen, decided to use the "slightly prominent" commander-in-chief and college student Tu Hai to send troops to suppress him. On March 29th, the king of Duoluo New County, E Zagreb, was appointed as General Fuyuan and Tu Hai as Deputy General. In fact, Tu Hai played a major role. In the face of the difficult situation of "all guards are empty" in Beijing, Tu Hai "dressed as the slave of the Eight Banners" and got permission, but he got "tens of thousands of people". He quickly formed an army and prepared to take Shanhaiguan to face Bourny.

In other words, a group of Eight Banners slaves were recruited, but it was not Wu Sangui who fought in the war, but Bourny, a Mongolian who rebelled in San Francisco.