Why did the imperial concubines attack the seventeenth master?

Because Zhen Xuan was having an affair with the 17th master, he was discovered by Kangxi's stick. Every letter from the 17th Master to Yu Yin was followed by the words Xi Guifei 'an, and Kangxi was cuckolded. Who can stand it? It's unbearable. Of course, he will kill the 17th master.

It turned out that Kangxi was a cuckold king, but his two sons and daughters were not his own, and his face was covered with blue veins.