Those Things About Me Cultivating Immortality in Another World

Cultivation? Just forget it. Isn't it good to be a salted fish? Chopping firewood, hunting, picking up girls every day, and having two children later, this life is so comfortable. However, his grandfather was killed and his fiancée committed suicide in humiliation! What I want is so simple, but why is God so unfair to me! The protagonist embarks on a journey of cultivating immortality for revenge.