Rebirth To Counterattack

Shu Haoran spent thirty years interpreting the meaning and extension of "no learning, no skill" and then died.
The person who killed him was none other than the elder brother that he thought was the best for him, so he died in a daze.
After his rebirth, with a childish face, he used the heart of a thirty-year-old old man to look at the world and gradually discovered the crux of the problem.
Then, what did rebirth mean? Can what has already happened be changed?
This is the story of a reincarnated pig eating a tiger.
The male lead reversed the fates from second generation to elite, while the female lead reversed with the male, changing from passer-by A to female.