Kangxi acceded to the throne at the age of eight and killed Ao Bai, which gave the young emperor great confidence, but almost capsized in the San Francisco rebellion. I started fighting when I couldn't bear to be stronger than a horse. This gave Kangxi a great blow and anxiety. Geng Zhongjing, king of Jingnan, is one of the San Francisco. His ancestor was the Qing Dynasty when Mao, commander-in-chief of the Ming Dynasty, surrendered. He was highly valued by Huang Taiji, but Geng rebelled against Wu Sangui and had ties with Taiwan Province and Zheng Jing. Later, the army that could not resist Kangxi chose to surrender. Emperor Kangxi still used him to make him plead guilty and make meritorious deeds, but he still had the heart of rebellion and the defendant was executed in the middle of the year.

The San Francisco Rebellion originated from Kangxi's failure to resist the will to withdraw from San Francisco and his early execution, which inspired the rebellion of Wu Sangui and others. Like other dynasties in history, the reason for removing the buffer region was that the sky was high and the emperor was far away. Soldiers' self-esteem has an independent crisis. No one can sleep well for an emperor with a high concentration of monarchy. In the San Francisco Rebellion, Wu Sangui killed Zhu Guozhi, the governor of the imperial court, and launched a rebellion. So Geng killed Fan, the governor of Fujian, and attacked Zhejiang in three ways. For the sake of publicity, he also invited Zheng Jing from Taiwan Province Province to confront him.

But Geng's rebellion won't last long. First, his troops are insufficient, with a total number of 70,000 to 80,000; Second, he is short of food and grass and will not last long; Third, there is mutual suspicion and distrust with Wu Sangui, Taiwan Province Province and Zheng Jing. Especially Taiwan Province Province and Zheng Jing even hit him behind his back and had to surrender between Scylla and Charybdis. After the surrender, Kangxi made Geng plead guilty and make meritorious deeds. Geng really lived up to his mission, defeated Zheng Jing, drove him back to Taiwan Province, and defeated Shang Zhixin.

San Francisco's withdrawal is certain, and Geng does not have the ability to rebel again in a short time, which does not rule out one factor: Fan is a very effective and respected minister of Kangxi. People in Fujian prefer Fan. After his death, Kangxi was very sad. As for Geng, he still has the heart of rebellion after making achievements, so many people speculate that Kangxi has the heart of killing Geng.