Chen Gong was the first person to follow Cao Cao. How did Cao Cao feel when he killed the benefactor?

It's hard to say. After all, Cao Cao is not really inhuman. After Yujin surrendered, Cao Cao knew that it was just an unpredictable sigh, indicating that he also had feelings for the people around him. But after all, he is a very decisive politician, blocking his power and killing people without blinking an eye. So Chen Gong stood in his way. He refused to surrender and killed him decisively. So in general, Cao Cao's mood will be somewhat complicated. But this will not shake his path to power.