Reborn as My Ex-Boyfriend's Stepmother

The story comes from my imagination. Will the person after rebirth still be the same person? Will the original timeline be changed after rebirth? In my setting, Lin Ling was the one who saved Song Haoyu and cured Song Haoyu of his paranoia, selfishness, indifference, and violence. Without Lin Ling, Song Haoyu might have been trapped in the past and fallen into the shadows.