What changes have taken place in old Du Guan's attitude towards Yang Zhi before and after, and what are the reasons for the changes?

The old manager previously looked down on Yang Zhi and thought that Yang Zhi was a prisoner with equal words.

Later, on the road, although I apparently listened to Yang Zhi's words and thought that Yang Zhi's promotion would crush people, I was still not satisfied.

Later, I didn't cut the birthday outline, and the old manager blamed Yang Zhi! ! Because of the selfishness of human nature, without the birth procedure, it is difficult for everyone to get rid of their own responsibilities. It is better to let one person bear it! ! ! ! ! ! ! ! ! ! Hahaha, I don't know how! ! ! ! ! ! ! ! !