To deal with a man who posed as a threat to Divine Wind Palace, the best method would be to destroy him mentally as well as physically.
It was not the first time that Divine Wind Palace had to do this kind of thing. They had done this many times already!
Zhou Bao's rising fame was believed to be quite unusual. At first, Zhou Bao did not catch the attention of Yu Taixu. But by the time that he took notice of Zhou Bao, Yu Taixu found that he might not be able to tame this guy without first having to pay a great price. Then, when Yu Taixu finally made up his mind to get rid of him with his own Upper-grade Pure Yang Celestial Device, he belatedly realized that he could not get rid of him at all. This fact made him feel very depressed and dispirited. Now that Zhou Bao's strength had grown to such a high level, he had no choice but to stop his secret actions and lie low. After all, how could one continue an operation when he knew it was bound to fail?