It's so Sweet to Be Reborn with Someone Who Wants Nothing from Your Mortal Enemy.

Lin Yun's previous life was really a tragedy. Although her parents were still alive and her family was well off, she lived like a servant. Her parents adopted a girl named Lin Ai, who loved her even more than her biological daughter. But she, her biological daughter, was targeted everywhere as if she had been picked up. It was her fault that Lin Ai fell, it was her fault that Lin Ai was tired, and it was even her fault that Lin Ai was hungry, hot, and sick. It seemed like everything she did was wrong. But these two people were her parents, so he remained filial to them as always, until Lin Ai got into something he shouldn't have gotten into when she grew up, causing the family to owe a lot of debt. She worked hard to earn money for them, but they didn't think it was enough. At that time, Lin Yun knew that she could not survive. Opening her eyes again, Lin Yun found herself back when she was six years old, the year her parents adopted Lin Ai.